The Leakage Problem
I’ve spent more than ten years talking about the cost of construction of physical infrastructure, starting with subways and then branching on to other things, most.
And yet there’s a problem of comparable size when discussing infrastructure waste, which, lacking any better term for it, I am going to call leakage. The definition of leakage is any project that is bundled into an infrastructure package that is not useful to the project under discussion and is not costed together with it. A package, in turn, is any program that considers multiple projects together, such as a stimulus bill, a regular transport investment budget, or a referendum. The motivation for the term leakage is that money deeded to megaprojects leaks to unrelated or semi-related priorities. This often occurs for political reasons but apolitical examples exist as well.
Before going over some examples, I want to clarify that the distinction between leakage and high costs is not ironclad. Sometimes, high costs come from bundled projects that are costed together with the project at hand; in the US they’re called betterments, for example the $100 million 3 km bike lane called the Somerville Community Path for the first, aborted iteration of the Green Line Extension in Boston. This blur is endemic to general improvement projects, such as rail electrification, and also to Northeast Corridor high-speed rail plans, but elsewhere, the distinction is clearer.
Finally, while normally I focus on construction costs for public transport, leakage is a big problem in the United States for highway investment, for political reasons. As I will explain below, I believe that nearly all highway investment in the US is waste thanks to leakage, even ignoring the elevated costs of urban road tunnels.
State of good repair
A month ago, I uploaded a video about the state of good repair grift in the United States. The grift is that SOGR is maintenance spending funded out of other people’s money – namely, a multiyear capital budget – and therefore the agency can spend it with little public oversight. The construction of an expansion may be overly expensive, but at the end of the day, the line opens and the public can verify that it works, even for a legendarily delayed project like Second Avenue Subway, the Berlin-Brandenburg Airport, or the soon-to-open Tel Aviv Subway. It’s a crude mechanism, since the public can’t verify safety or efficiency, but it’s impossible to fake: if nothing opens, it embarrasses all involved publicly, as is the case for California High-Speed Rail. No such mechanism exists for maintenance, and therefore, incompetent agencies have free reins to spend money with nothing to show for it. I recently gave an example of unusually high track renewal costs in Connecticut.
The connection with leakage is that capital plans include renewal and long-term repairs and not just expansion. Thus, SOGR is leakage, and when its costs go out of control, they displace funding that could be used for expansion. The NEC Commission proposal for high-speed rail on the Northeast Corridor calls for a budget of $117 billion in 2020 dollars, but there is extensive leakage to SOGR in the New York area, especially the aforementioned Connecticut plan, and thus for such a high budget the target average speed is about 140 km/h, in line with the upgraded legacy trains that high-speed lines in Europe replace.
Regionally, too, the monetary bonfire that is SOGR sucks the oxygen out of the room. The vast majority of the funds for MTA capital plans in New York is either normal replacement or SOGR, a neverending program whose backlog never shrinks despite billions of dollars in annual funding. The MTA wants to spend $50 billion in the next 5 years on capital improvements; visible expansion, such as Second Avenue Subway phase 2, moving block signaling on more lines, and wheelchair accessibility upgrades at a few stations, consists of only a few billion dollars of this package.
This is not purely an American issue. Germany’s federal plan for transport investment calls for 269.6 billion euros in project capital funding from 2016 to 2030, including a small proportion for projects planned now to be completed after 2031; as detailed on page 14, about half of the funds for both road and rail are to go to maintenance and renewal and only 40% to expansion. But 40% for expansion is still substantially less leakage than seen in American plans like that for New York.
Betterments and other irrelevant projects
Betterments straddle the boundary between high costs and leakage. They can be bundled with the cost of a project, as is the case for the Somerville Community Path for original GLX (but not the current version, from which it was dropped). Or they can be costed separately. The ideal project breakdown will have an explicit itemization letting us tell how much money leaked to betterments; for example, for the first Nice tramway line, the answer is about 30%, going to streetscaping and other such improvements.
Betterments fall into several categories. Some are pure NIMBYism – a selfish community demands something as a precondition of not publicly opposing the project, and the state caves instead of fighting back. In Israel, Haifa demanded that the state pay for trenching portions of the railroad through the southern part of the city as part of the national rail electrification project, making specious claims about the at-grade railway separating the city from the beach and even saying that high-voltage electrification causes cancer. In Toronto, the electrification project for the RER ran into a similar problem: while rail electrification reduces noise emissions, some suburbs still demanded noise walls, and the province caved to the tune of $1 billion.
Such extortion is surplus extraction – Israel and Toronto are both late to electrification, and thus those projects have very high benefit ratios over base costs, encouraging squeaky wheel behavior, raising costs to match benefits. Keeping the surplus with the state is crucial for enabling further expansion, and requires a combination of the political courage to say no and mechanisms to defer commitment until design is more advanced, in order to disempower local communities and empower planners.
Other betterments have a logical reason to be there, such as the streetscape and drainage improvements for the Nice tramway, or to some extent the Somerville Community Path. The problem with them is that chaining them to a megaproject funded by other people’s money means that they have no sense of cost control. A municipality that has to build a bike path out of its own money will never spend $100 million on 3 km; and yet that was the projected cost in Somerville, where the budget was treated as acceptable because it was second-order by broader GLX standards.
Bad expansion projects
Sometimes, infrastructure packages include bad with good projects. The bad projects are then leakage. This is usually the politically hardest nut to crack, because usually this happens in an environment of explicit political negotiation between actors each wanting something for their own narrow interest.
For example, this can be a regional negotiation between urban and non-urban interests. The urban interests want a high-value urban rail line; the rest want a low-value investment, which could be some low-ridership regional rail or a road project. Germany’s underinvestment in high-speed rail essentially comes from this kind of leakage: people who have a non-urban identity or who feel that people with such identity are inherently more morally deserving of subsidy than Berlin or Munich oppose an intercity high-speed rail network, feeling that trains averaging 120-150 km/h are good enough on specious polycentricity grounds. Such negotiation can even turn violent – the Gilets Jaunes riots were mostly white supremacist, but they were white supremacists with a strong anti-urban identity who felt like the diesel taxes were too urban-focused.
In some cases, like that of a riot, there is an easy solution, but when it goes to referendum, it is harder. Southern California in particular has an extreme problem of leakage in referendums, with no short- or medium-term solution but to fund some bad with the good. California’s New Right passed Prop 13, which among other things requires a 2/3 supermajority for tax hikes. To get around it, the state has to promise somthing explicit to every interest group. This is especially acute in Southern California, where “we’re liberal Democrats, we’re doing this” messaging can get 50-60% but not 67% as in the more left-wing San Francisco area and therefore regional ballot measures for increasing sales taxes for transit have to make explicit promises.
The explicit promises for weak projects, which can be low-ridership suburban light rail extensions, bond money for bus operations, road expansion, or road maintenance, damage the system twice. First, they’re weak on a pure benefit-cost ratio. And second, they commit the county too early to specific projects. Early commitment leads to cost overruns, as the ability of nefarious actors (not just communities but also contractors, political power brokers, planners, etc.) to demand extra scope is high, and the prior political commitment makes it too embarrassing to walk away from an overly bloated project. For an example of early commitment (though not of leakage), witness California High-Speed Rail: even now the state pretends it is not canceling the project, and is trying to pitch it as Bakersfield-Merced high-speed rail instead, to avoid the embarrassment.
The issue of roads
I focus on what I am interested in, which is public transport, but the leakage problem is also extensive for roads. In the United States, road money is disbursed to the tune of several tens of billions of dollars per year in the regular process, even without any stimulus funding. It’s such an important part of the mythos of public works that it has to be spread evenly across the states, so that politicians from a bygone era of non-ideological pork money can say they’ve brought in spending to their local districts. I believe there’s even a rule requiring at least 92% of the fuel tax money generated in each state to be spent within the state.
The result is that road money is wasted on low-growth regions. From my perspective, all road money is bad. But let’s put ourselves for a moment in the mindset of a Texan or Bavarian booster: roads are good, climate change is exaggerated, deficits are immoral (German version) or taxes are (Texan version), the measure of a nation’s wealth is how big its SUVs are. In this mindset, road money should be spent prudently in high-growth regions, like the metropolitan areas of the American Sunbelt or the biggest German cities. It definitely should not be spent in declining regions like the Rust Belt, where due to continued road investment and population decline, there is no longer traffic congestion.
And yet, road money is spent in those no-congestion regions. Politicians get to brag about saving a few seconds’ worth of congestion with three-figure million dollar interchanges and bypasses in small Rust Belt towns, complete with political rhetoric about the moral superiority of regions whose best days lay a hundred years ago to regions whose best days lie ahead.
Leakage and consensus
It is easy to get trapped in a consensus in which every region and every interest group gets something. This makes leakage easier: an infrastructure package will then have something for everyone, regardless of any benefit-cost analysis. Once the budget rather than the outcome becomes the main selling point, black holes like SOGR are easy to include.
It’s critical to resist this trend and fight to oppose leakage. Expansion should go to expansion, where investment is needed, and not where it isn’t. Failure to do so leads to hundreds of billions in investment money most of which is wasted independently for the construction cost problem.
Streets Before Trust
There’s an emerging mentality among left-wing urban planners in the US called “trust before streets.” It’s a terrible idea that should disappear, a culmination of about 50 or 60 years of learned helplessness in the American public sector. Too many people who I otherwise respect adhere to this idea, so I’m dedicating a post to meme-weeding it. The correct way forward is to think in terms of state capacity first, and in particular about using the state to enact tangible change, which includes providing better public transportation and remaking streets to be safer to people who are not driving. Trust follows – in fact, among low-trust people, seeing the state provide meaningful tangible change is what can create trust, and not endless public meetings in which an untrusted state professes its commitment to social justice.
What is trust before streets?
The trust before streets mentality, as currently used, means that the state has to first of all establish buy-in before doing anything. Concretely, if the goal is to make the streets safer for pedestrians, the state must not just build a pop-up bike lane or a pedestrian plaza overnight, the way Janette Sadik-Khan did in New York, because that is insensitive to area residents. Instead, it must conduct extensive public outreach to meet people where they’re at, which involves selling the idea to intermediaries first.
This is always sold as a racial justice or social justice measure, and thus the idea of trust centers low-income areas and majority-minority neighborhoods (and in big American cities they’re usually the same – usually). Thus, the idea of trust before streets is that it is racist to just build a pedestrian plaza or bus lanes – it may not be an improvement, and if it is, it may induce gentrification. I’ve seen people in Boston say trust before streets to caution against the electrification of the Fairmount Line just because of one article asserting there are complaints about gentrification in Dorchester, the low-income diverse neighborhood the line passes through (in reality, the white population share of Dorchester is flat, which is not the case in genuinely gentrifying American neighborhoods like Bushwick).
I’ve equally seen people use the expression generational trauma. In this way, the trust before streets mentality is oppositional to investments in state capacity. The state in a white-majority nation is itself white-majority, and people who think in terms of neighborhood autonomy find it unsettling.
Low trust and tangible results
The reality of low-trust politics is about the opposite of what educated Americans think it is. It is incredibly concrete. Abstract ideas like social justice, rights, democracy, and free speech do not exist in that reality, to the point that authoritarian populists have exploited low-trust societies like those of Eastern Europe to produce democratic backsliding. A Swede or a German may care about the value of their institutions and punish parties that run against them, but an Israeli or a Hungarian or a Pole does not.
In Israel, this is visible in the corona crisis: Netanyahu’s popularity, as expressed in election polls, has recently risen and fallen based on how Israel compares with the Western world when it comes to handling corona. In March, there was a rally-around-the-flag effect in Israel as elsewhere, giving Netanyahu cover to refuse to concede even though parties that pledged to replace him as prime minister with Benny Gantz got 62 out of 120 seats, and giving Gantz cover not to respond to hardball with hardball and instead join as a minister in Netanyahu’s government. Then in April and May, as Israel suppressed the first wave and had far better outcomes than nearly every European country, let alone the US, Netanyahu’s popularity surged while that of Gantz and the opposition cratered. The means did not matter – the entire package including voluntary quarantine hotels, Shin Bet surveillance for contact tracing, and a tight lockdown that Netanyahu, President Rivlin, and several ministers violated nonchalantly, was seen to produce results.
In the summer, this went in reverse. The second wave hit Israel earlier than elsewhere, and by late summer, its infection rate per capita was in the global top ten, and Israel had the largest population among those top ten countries. In late September it reached around 6,000 cases a day, around 650 per million people. The popularity of Netanyahu’s coalition was accordingly shot; Gantz himself is being nearly wiped out in the polls, but the opposition was holding steady, and Yamina, a party to the right of Likud led by Naftali Bennett that is not currently in the coalition and is perceived as more competent, Bennett himself having done a lot to moderate the party’s line, surged from its tradition 5-6 seats to 16.
Today the situation is unclear – Israelis have seen the state fight the second wave but it was not nearly as successful as in the spring, and right now there is a lot of chaos with vaccination. On the other hand, Israel is also the world’s vaccination capital, and eventually people will notice that by March Israel is (most likely) fully vaccinated while Germany is less than 10% vaccinated. Low-trust people notice results. If they’re disaffected with Netanyahu’s conduct, which most people are, they can then vote for a right-wing-light satellite party like New Hope, just as many voted Kulanu in 2015, which advertised itself as center, became kingmaker after the results were announced, and immediately joined under Netanyahu without trying to seriously negotiate.
Streets lead to trust
The story of corona in Israel does not exist in isolation. Low trust in many cases exists because people perceive the state to be hostile to their interests, which happens when it does not provide tangible goods. Many years ago, talking about his own history immigrating from the Soviet Union in the 1970s, Shalom Boguslavsky credited the welfare state for his integration, saying that if he’d immigrated in the 1990s he’d probably have ended up in a housing project in Ashdod and voted for Avigdor Lieberman, who at the time was running on Russian resentment more than anything.
In Northern Europe, perhaps trust is high precisely because the state provides things. My total mistrust of the German state in general and Berlin in particular is tempered by the fact that, at queer meetups, people remind me that Berlin’s center-left coalition has passed universal daycare, on a sliding scale ranging from 0 for poor parents to about €100/month for wealthy ones. This more than anything reminds me and others that the state is good for things other than dithering on corona and negatively stereotyping immigrant neighborhoods.
Such provisions of tangible goods cannot happen in a trust before streets environment. This works when the state takes action, and endless public meetings in which every objection must be taken seriously are the death of the state. It says a lot that in contrast with Northern Europe, in the United States even in wealthy left-wing cities it is unthinkable that the municipality can just raise taxes to pay teachers and social workers better. Low trust is downstream of low state capacity. Build the streets and trust will follow.
Costs Matter: Some Examples
A bunch of Americans who should know better tell me that nobody really cares about construction costs – what matters is getting projects built. This post is dedicated to them; if you already believe that efficiency and social return on investment matter then you may find these examples interesting but you probably are not looking for the main argument.
Exhibit 1: North America
I wrote a post focusing on some North American West Coast examples 5 years ago, but costs have since run over and this matters from the point of view of building more in the future. In the 2000s and 10s, Vancouver had the lowest construction costs in North America. The cost estimate for the Broadway subway in the 2010s was C$250 million per kilometer, which is below world median; subsequently, after I wrote the original post, an overrun by a factor of about two was announced, in line with real increases in costs throughout Canada in the same period.
Metro Vancouver has always had to contend with small, finite amounts of money, especially with obligatory political waste. The Broadway subway serves the two largest non-CBD job centers in the region, the City Hall/Central Broadway area and the UBC, but in regional politics it is viewed as a Vancouver project that must be balanced with a suburban project, namely the lower-performing Surrey light rail. Thus, the amount of money that was ever made available was about in line with the original budget, which is currently only enough to build half the line. Owing to the geography of the West Side, half a line is a lot less than half as good as the full line, so Vancouver’s inability to control costs has led to worse public transportation investment.
Like Vancouver, Toronto has gone from having pretty good cost control 20 years ago to having terrible cost control today. Toronto’s situation is in fact worse – its urban rail program today is a contender for the second most expensive per kilometer in the world, next to New York. The question of whether it beats Singapore, Hong Kong, London, Melbourne, Manila, Qatar, and Los Angeles depends on project details, essentially on scoring which of these is geologically and geographically the hardest to build in assuming competent leadership, which is in short supply in all of these cities. I am even tempted to specifically blame the most recent political interference for the rising costs, just as the adoption of design-build in the 2000s as an in-vogue reform must be blamed for the beginning of the cost blowouts.
The result is that Toronto is building less stuff. It’s been planning a U-shaped Downtown Relief Line for decades, since only the Yonge-University-Spadina (“YUS”) line serves downtown proper and is therefore overcrowded. However, it’s not really able to afford the full line, and hence it keeps downgrading it with various iterations, right now to an inverted L for the Ontario Line project.
Los Angeles’s costs, uniquely in the United States, seemed reasonable 15 years ago, and no longer are. This, as in Canada, can be seen in building less stuff. High-ranking officials at Los Angeles Metro explained to me and Eric that the money for capital expansion is bound by formulas decided by referendum; there is a schedule for how to spend the money as far as 2060, which means that anything that is not in the current plan is not planned to be built in the next 40 years. Shifting priorities is not really possible, not with how Metro has to buy off every regional interest group to ensure the tax increases win referendums by the required 2/3 supermajority. And even then, the taxes imposed are rising to become a noticeable fraction of consumer spending – even if California went to majority vote, its tax capacity would remain very finite.
The history of Second Avenue Subway screams “we would have built more had costs been lower.” People with deeper historic grounding than I do have written at length about the problems of the Independent Subway System (“IND”) built in the 1920s and 30s; in short, construction costs were in today’s terms around $140 million per km, which at the time was a lot (London and Paris were building subways for $30-35 million/km), and this doomed the Second System. But the same impact of high costs, scaled to the modern economy, is seen for the current SAS project.
The history of SAS is that it was planned as a single system from 125th Street to Hanover Square. The politician most responsible for funding it, Sheldon Silver, represented the Lower East Side. But spending capacity was limited, and in particular Silver had to trade that horse for East Side Access serving Long Island, which was Governor George Pataki’s base. The package was such that SAS could only get a few billion dollars, whereas at the time the cost estimate for the entire 13-km line was $17 billion. That’s why SAS was chopped into four phases, starting on the Upper East Side. Silver himself signed off on this in the early 2000s even though his district would only be served in phase four: he and the MTA assumed that there would be further statewide infrastructure packages and the entire line would be complete by 2020.
Exhibit 2: Israel
Israel is discussing extending the Tel Aviv Metro. It sounds weird to speak of extensions when the first line is yet to open, but that line, the Red Line, is under construction and close enough to the end that people are believing it will happen; Israelis’ faith that there would ever be a subway in Tel Aviv was until recently comparable to New Yorkers’ faith until the early 2010s that Second Avenue Subway would ever open. The Red Line is a subway-surface Stadtbahn, as is the under-construction Green Line and the planned Purple Line. But metropolitan Tel Aviv keeps growing and is at this point an economic conurbation of about 3-4 million people, with a contiguous urban core of 1.5 million. It needs more. Hence, people keep discussing additions. The Ministry of Finance, having soured on the Stadtbahn idea, bypassed the Ministry of Transport and introduced a complementary three-line underground driverless metro system.
The cost of the system is estimated at 130-150 billion shekels, which is around $39 billion. This is not a sum Israelis are used to seeing for a government project. It’s about two years’ worth of IDF spending, and Israeli is a militarized society. It’s about 10% of annual GDP, which in American or EU-wide terms would be $2 trillion. The state has many competing budget priorities, and there are so many other valid claims on the state coffers. It is therefore likely that the metro project’s construction will stretch over many years, not out of planning latency but out of real resource limits. People in Israel understand that Gush Dan has severe traffic congestion and needs better transportation – this is not a point of political controversy in a society that has many. But this means the public is willing to spend this amount of money over 15-20 years at the shortest. Were costs to double, in line with the costs in most of th Anglosphere, it would take twice as long; were they to fall in half, in line with Mediterranean Europe, it would take half as long.
Exhibit 3: Spain
As the country with the world’s lowest construction costs for infrastructure, Spain builds a lot of it, everywhere. This includes places where nobody else would think to build a metro tunnel or an airport or a high-speed rail line; Spain has the world’s second longest high-speed rail network, behind China. Many of these lines probably don’t even make sense within a Spanish context – RENFE at best operationally breaks even, and the airports were often white elephants built at the peak of the Spanish bubble before the 2008 financial crisis.
One can see this in urban rail length just as in high-speed rail. Madrid Metro is 293 km long, the third longest in Europe behind London and Moscow. This is the result of aggressive expansion in the 1990s and 2000s; new readers are invited to read Manuel Melis Maynar’s writeup of how when he was Madrid Metro’s CEO he built tunnels so cheaply. Expansion slowed down dramatically after the financial crisis, but is starting up again; the Spanish economy is not good, but when one can build subways for €100 million per kilometer, one can build subways that other cities would not. In addition to regular metros, Madrid also has regional rail tunnels – two of them in operation, going north-south, with a third under construction going east-west and a separate mainline rail tunnel for cross-city high-speed rail.
Exhibit 4: Japan
Japan practices economic austerity. It wants to privatize Tokyo Metro, and to get the best price, it needs to keep debt service low. When the Fukutoshin Line opened in 2008, Tokyo Metro said it would be the system’s last line, to limit depreciation and interest costs. The line amounted to around $280 million/km in today’s money, but Tokyo Metro warned that the next line would have to cost $500 million/km, which was too high. The rule in Japan has recently been that the state will fund a subway if it is profitable enough to pay back construction costs within 30 years.
Now, as a matter of politics, on can and should point out that a 30-year payback, or 3.3% annual interest, is ridiculously high. For one, Japan’s natural interest rate is far lower, and corporations borrow at a fraction of that interest; JR Central is expecting to be paying down Chuo Shinkansen debt until the 2090s, for a project that is slated to open in full in the 2040s. However, if the state changes its rule to something else, say 1% interest, all that will change is the frontier of what it will fund; lines will continue to be built up to a budgetary limit, so that the lower the construction costs, the more stuff can be built.
Conclusion: the frontier of construction
In a functioning state, infrastructure is built as it becomes cost-effective based on economic growth, demographic projections, public need, and advances in technology. There can be political or cultural influences on the decisionmaking process, but they don’t lead to huge swings. What this means is that as time goes by, more infrastructure becomes viable – and infrastructure is generally built shortly after it becomes economically beneficial, so that it looks right on the edge of viability.
This is why megaprojects are so controversial. Taiwan High-Speed Rail and Korea Train Express are both very strong systems nowadays. Total KTX ridership stood at 89 million in 2019 and was rising on the eve of corona, thanks to Korea’s ability to build more and more lines, for example the $69 million/km, 82% underground SRT reverse-branch. THSR, which has financial data on Wikipedia, has 67 million annual riders and is financially profitable, returning about 4% on capital after depreciation, before interest. But when KTX and THSR opened, they both came far below ridership projections, which were made in the 1990s when they had much faster economic convergence before the 1997 crisis. They were viewed as white elephants, and THSR could not pay interest and had to refinance at a lower rate. Taiwan and South Korea could have waited 15 years and only opened HSR now that they have almost fully converged to first-world Western incomes. But why would they? In the 2000s, HSR in both countries was a positive value proposition; why skip on 15 years of good infrastructure just because it was controversially good then and only uncontroversially good now?
In a functioning state, there is always a frontier of technology. The more cost-effective construction is, the further away the frontier is and the more infrastructure can be built. It’s likely that a Japan that can build subways for Korean costs is a Japan that keeps expanding the Tokyo rail network, because Japan is not incompetent, just austerian and somewhat high-cost. The way one gets more stuff built is by ensuring costs look like those of Spain and Korea and not like those of Japan and Israel, let alone those of the United States and Canada.
I recently covered the Stadtbahn, a mode of rail transportation running as rapid transit (almost always a subway) in city center and as a tramway farther out. The tram-train is the opposite kind of system: it runs as a tramway within the city, but as rapid transit farther out. There’s a Human Transit blog post about this from 2009, describing how it works in Karlsruhe, which invented this kind of service pattern. Jarrett is bearish on the tram-train in most contexts, giving a list of required patterns that he says is uncommon elsewhere. It’s worth revising this question, because while the tram-train is not very useful in an American context, it is in countries with discontinuous built-up areas, including Germany and the Netherlands but also Israel. Israeli readers may be especially interested in how this technology fits the rail network away from the Tel Aviv region.
What is a tram-train?
Let’s dredge the 2*2 table from the Stadtbahn post:
|Slow in center||Fast in center|
|Slow in outlying areas||Tramway||Stadtbahn|
|Fast in outlying areas||Tram-train||Rapid transit|
The terms fast and slow are again relative to general traffic. The Paris Métro averages 25 km/h, less than some mixed-traffic buses in small cities, but it still counts as fast because the speed in destinations accessed per hour is very high.
Be aware that I am using the terms Stadtbahn and tram-train to denote two different things, but in Karlsruhe the system is locally called Stadtbahn. German cities use the term Stadtbahn to mean “a tramway that doesn’t suck,” much as American cities call a dazzling variety of distinct things light rail, including lines in all four cells of the above table. Nonetheless, in this post I am keeping my terminology distinct, using the advantage of switching between different languages and dialects.
Tram-trains and regional rail
The Karlsruhe model involves trains running on mainline track alongside mainline trains, diverging to dedicated tramway tracks in the city, to connect Karlsruhe Hauptbahnhof with city center around Marktplatz. This also includes lines that do not touch the mainline, like S2, but still run with higher-quality right-of-way separation outside city center; but most lines run on mainline rail part of the way.
North American light rail lines, with the exception of the Boston, Philadelphia, and San Francisco Stadtbahn systems, tend to run as tram-trains, but never have this regional rail tie-in. They run on entirely dedicated tracks, which has two important effects, both negative. First, it increases construction costs. And second, it means that the shape of the network is much more a skeletal tramway map than the more complicated combination of an S-Bahn and a tramway that one sees in Karlsruhe. San Diego has a short segment sharing tracks with freight with time separation, but the shape of the network isn’t any different from that of other American post-1970s light rail systems, and there’s an ongoing extension parallel to a mainline railroad that nonetheless constructs a new right-of-way.
In this sense, the Karlsruhe model can be likened to a cheaper S-Bahn. S-Bahn systems carve new right-of-way under city center to provide through-service whenever the historic city station is a terminus, such as in Frankfurt, Stuttgart, Munich, or German-inspired Philadelphia. They can also build new lines for more expansive service, higher capacity, or a better connection to city center, like the second S-Bahn trunk in Hamburg; Karlsruhe itself is building a combined road and rail tunnel, the Kombilösung, after a generation of at-grade operation. The tram-train is then a way to achieve some of the same desirable attributes but without spending money on a tunnel.
It follows that the tram-train is best when it can run on actual regional rail tracks, with good integration with the mainline system. It is a lower-speed, lower-cost version of a regional rail tunnel, whereas the North American version running on dedicated tracks is a lower-cost version of a subway. Note also that regional rail can be run at different scales, the shorter and higher-frequency end deserving the moniker S-Bahn; the Karlsruhe version is long-range, with S1 and S11 reaching 30 km south of city center and S5 reaching 70 km east.
Where is a tram-train appropriate?
Jarrett’s 2009 post lays down three criteria for when tram-trains work:
- The travel market must be small enough that an S-Bahn tunnel is not justified.
- The destination to be served isn’t right next to the rail mainline.
- The destination to be served away from the mainline is so dominant that it’s worthwhile running at tramway speeds just to get there and there aren’t too many people riding the line beyond it.
The center of Karlsruhe satisfies the second and third criteria. It is borderline for the first – the region has maybe a million people, depending on definitions, and the city proper has 312,000 people; the Kombilösung is only under-construction now and was not built generations ago, unlike S-Bahn tunnels in larger cities like Munich.
Jarrett points out that in the urban world he’s most familiar with, consisting of the United States, Canada, Australia, and New Zealand, it is not common for cities to satisfy these criteria. He does list exceptions, for example Long Beach, where the Blue Line runs in tramway mode before heading into Los Angeles on a mostly grade-separated right-of-way, whereupon it goes back into the surface in Downtown LA before heading into an under-construction tunnel. But overall, this is not common. City centers tend to be near the train station, and in the United States there’s such job sprawl that just serving one downtown destination is not good enough.
That said, the Long Beach example is instructive, because it is not the primary city in its region – Los Angeles is. I went over the issue of outlying S-Bahn tunnels a year ago, specifying some places where they are appropriate in Israel. The tram-train must be a key tool in the planner’s box as a cheaper, lower-capacity, lower-speed version of the same concept, diverging from the mainline in tramway mode in order to serve a secondary center. Karlsruhe itself is a primary urban center – the only time it’s the secondary node is when it connects to Mannheim, and that train doesn’t use the tramway tracks – but a secondary tram-train connection is being built in outlying areas there, namely Heilbronn.
Different models of urban geography
In the American model of urban geography, cities are contiguous blobs. Stare at, for example, Chicago – you’ll see an enormous blob of gray stretching in all directions. Parkland is mostly patches of green in between the gray, or sometimes wedges of green alternating with wedges of gray, the gray following commuter railroads and the green lying in between. Boundaries between municipalities look completely arbitrary on a satellite map.
In the German model of urban geography, it’s different. Look at Cologne, Frankfurt, Mannheim, or Stuttgart – the built-up area is surrounded by green, and then there are various suburban towns with parkland or farmland in between. This goes even beyond the greenbelt around London – there’s real effort at keeping all these municipalities distinct.
I don’t want to give the impression that the United States is the weird one. The contiguous model in the United States is also common in France – Ile-de-France is one contiguous built-up area. That’s how despite being clearly a smaller metropolitan region than London, Paris has the larger contiguous population – see here, WUP 2007, and see also how small the German and Dutch urban areas look on that table. Urban agglomeration in democratic East Asia is contiguous as in the US and France. Canada looks rather American to me too, especially Vancouver, the city both Jarrett and I are the most familiar with, while Toronto has a greenbelt.
This distinction moreover has to be viewed as a spectrum rather than as absolutes. Boston, for example, has some of the German model in it – there’s continuous urbanization with inner suburbs like Cambridge and Newton, but beyond Route 128, there are many small secondary cities with low density between them and the primary center. Conversely, Berlin is mostly American or French; the few suburbs it has outside city limits are mostly contiguous with the city’s built-up area, with the major exception of Potsdam.
The relevance of this distinction is that in the German or Dutch model of urban geography, it’s likely that a railway will pass through a small city rather far from its center, fulfilling the second criterion in Jarrett’s post. Moreover, this model of independent podlike cities means that there is likely to be a significant core, which fulfills the third criterion. The first criterion is fulfilled whenever this is not the center of a large metropolitan area.
It’s not surprising, then, that the Karlsruhe model has spread to the Netherlands. This is not a matter of similarity in transport models: the Netherlands differs from the German-speaking world, for examples it does not have monocentric S-Bahns or S-Bahn tunnels and it builds train stations with bike parking where Germany lets people bring bikes on trains. Nonetheless, the shared model of distinct municipalities makes tram-train technology attractive in South Holland.
Israel and tram-trains
In Israel, there are very few historic railways. A large share of construction is new, and therefore has to either swerve around cities or tunnel to enter them, or in a handful of cases run on elevated alignments. Israel Railways and local NIMBYs have generally preferred swerving.
Moreover, the urban layout in Israel is very podlike. There do exist contiguous areas of adjacent cities; Tel Aviv in particular forms a single blob of gray with Ramat Gan, Givatayim, Bni Brak, Petah Tikva, Bat Yam, and Holon, with a total population of 1.5 million. But for the most part, adjacent cities are buffered with undeveloped areas, and the cities jealously fight to stay this way despite extensive developer pressure.
The final important piece in Israel’s situation is that despite considerable population growth, there is very little rail-adjacent transit-oriented development. The railway was an afterthought until the Ayalon Railway opened in 1993, and even then it took until last decade for mainline rail to be a significant regional mode of transport. The state aggressively builds new pod-towns without any attempt to expand existing towns toward the railway.
The upshot is that all three of Jarrett’s criteria for tram-trains are satisfied in Israel, everywhere except in and around Tel Aviv. Tel Aviv is large enough for a fully grade-separated route, i.e. the already-existing Ayalon Railway. Moreover, because Tel Aviv needs full-size trains, anything that is planned to run through to Tel Aviv, even as far as Netanya and Ashdod, has to be rapid transit, using short tunnels and els to reach city centers where needed. A tram-train through Ashdod may look like a prudent investment, but if the result is that it feeds a 45 meter long light rail vehicle through the Ayalon Railway then it’s a waste of precious capacity.
But Outside Tel Aviv, the case for tram-trains is strong. One of my mutuals on Twitter brings up the Beer Sheva region as an example. The mainline going north has a station called Lehavim-Rahat, vaguely tangent to Lehavim, a ways away from Rahat. It could get two tramway branches, one diverging to the built-up area of Lehavim, a small suburb that is one of Israel’s richest municipalities, and the other to Rahat, one of Israel’s poorest. There are also interesting options of divergence going south and east, but they suffer from being so far from the mainline the network would look scarcely different from an ordinary tramway.
Beer Sheva itself would benefit from tramways with train through-service as well. The commercial center of the city is close to the train station, but the university and the hospital aren’t, and are not even that close to the subsidiary Beer Sheva North station. The station is also awkwardly off-center, lying southeast of the city’s geographic center, which means that feeding buses into it with timed transfers screws internal connections. So tramway tracks on Rager Boulevard, cutting off Beer Sheva North for regional trains, would do a lot to improve regional connectivity in Beer Sheva; intercity trains should naturally keep using the existing line.
In the North, there are similar examples. Haifa is not going to need the capacity of full-size trains anytime soon, which makes the case for various branches diverging into smaller cities to provide closer service in tramway mode strong. Unlike in Beer Sheva, the case for doing so in the primary center is weak. Haifa’s topography is the stuff of nightmares, up a steep hill with switchback streets. The mainline already serves the Lower City well, and climbing the hill is not possible.
This creates an interesting situation, in which the technology of the tram-train in the North can be used to serve secondary cities like Kiryat Ata and Tirat Carmel and maybe enter the Old City of Acre, but the operational pattern is really that of a Stadtbahn – fast through Haifa and up most of the Krayot, slow through smaller suburbs.
I made an off-hand remark about subway-surface systems, called Stadtbahn in German (as is, confusingly, the fully grade-separated east-west Berlin S-Bahn line), regarding a small three-line single-tail network that Brooklyn could build. I also talked about it in a little more detail last year. I want to go more deeply into this now. It’s a public transportation typology that’s almost nonexistent outside Germany and Belgium; Tel Aviv is building one line, and the US has three but two of those are from more than 100 years ago. But there are interesting examples of good places to use this technology elsewhere, especially elsewhere in Europe.
What is the Stadtbahn?
The Stadtbahn (“city rail”), or the subway-surface line in US usage, is an urban line running light rail vehicles, with grade separation in city center and street running outside city center. All examples I know of are in fact underground in city center, but elevated lines or lines running in private rights-of-way could qualify too, and in Cologne, there’s a semi-example over a bridge dropping to the surface at both ends.
It’s best illustrated as a 2*2 grid:
|Slow in center||Fast in center|
|Slow in outlying areas||Tramway||Stadtbahn|
|Fast in outlying areas||Tram-train||Rapid transit|
The terms fast and slow are relative to general traffic, so a mixed-traffic bus in a low-density city that averages 30 km/h is slow whereas the Paris Métro, which averages 25 km/h, is fast; the speed in km/h may be higher on the bus, but the speed in destinations accessed per hour is incomparably higher on the Métro.
The tram-train is confusingly also called Stadtbahn in Germany, for example in Karlsruhe; this is nearly every light rail built in North America. It is not the topic of this post.
What is the purpose of the Stadtbahn?
Historically, Stadtbahn systems evolved out of pure surface tramways. City center congestion made the streetcars too slow, so transit agencies put the most congested segments underground. This goes back to Boston in 1897 with the Tremont Street Subway and Philadelphia in 1906 with the Subway-Surface Lines. The contrast both in that era and in the era of Stadtbahn construction in Germany from the 1960s to the 80s is with pure subways, which are faster but cost more because the entire route must be underground.
Stadtbahns always employ surface branching. This is for two reasons. First, there’s more capacity underground than on the surface, so the higher-capacity rapid transit segment branches to multiple lower-capacity tramways to permit high throughput. And second, there’s generally less demand on the outer segments than in the center – lines with very strong demand all the way tend to turn into full subways.
This is therefore especially useful for cities that are not huge. In a city the size of Cologne or Stuttgart or Hanover, there isn’t and will never be demand for a rapid transit system with good citywide coverage. Instead, there is something like a sector principle. For example, in Cologne, the Deutz side of the city, on the right bank of the Rhine, has service to city center on the S-Bahn, on tramway lines over the Deutzer Bridge branching on the surface, and on tramway lines over the Mülheimer and Severin Bridges feeding into the north-south ring Stadtbahn. Smaller cities have simpler systems – Hanover for has three underground trunk lines meeting at one central station, and Dortmund has three meeting in a Soviet triangle. This maintains good coverage even without the budget for many rapid transit lines.
Where are Stadtbahns appropriate?
Cities should consider this technology in the following cases:
- The city should not be too big. Tel Aviv is too big for this, and people in Israel are starting to recognize this fact and, in addition to the under-construction three-line Stadtbahn system are proposing a larger-scale three-line fully grade-separated metro system. If the city is big enough, then a full metro system is justified.
- There should be a definitive city center for substantial traffic to funnel to. The purpose of the Stadtbahn is to have comparable throughput to that of a metro, albeit with shorter trains.
- There should be wide swaths of sectors of the city where having multiple parallel lines is valuable. This, for example, is the case in cities that are not exceptionally dense and cannot expect transit-oriented development to completely saturate one metro corridor.
- The street network should not be too gridded, because then the sector-based branching is more awkward, and the combination of rapid transit to city center and a surface transit grid can be powerful, as in Toronto.
- There should be too much city center congestion for a pure surface system to work, for example if most streets are very narrow and traffic funnels to the few streets that can use
These circumstances are all common to German urbanism: city centers here are strong, but residential density peaks at 15,000/km^2 or thereabouts in near-center neighborhoods and drops to 3,000-6,000/km^2 farther out. Moreover, Germany lacks huge cities, and of the largest four urban cores – Berlin, Hamburg, Munich, Frankfurt – three have full rapid transit systems. Finally, grids are absent here except at very small scale, as in Mannheim.
However, these are not unique features to Germany. They’re common around Europe. European cities are not very big, and the only ones that can genuinely fill any subway line with transit-oriented development are a handful of very big, very rich ones like London and Paris. Even Stockholm and Munich have to be parsimonious; they have have full metro systems with branching.
The French way of building rapid transit does not employ the Stadtbahn, and perhaps it should. In a city the size of Bordeaux or Nice, putting a tramway underground in city center and then constructing new branches to expand access would improve coverage a lot.
This is likely also the case in Italian cities below the size class of Milan or Rome. Many of these cities are centered around Renaissance cores with very narrow streets, which are nonetheless auto-centric with impossibly narrow sidewalks, Italy having nearly the highest car ownership in Europe. Finding one to three good corridors for a subway and then constructing tramways funneling into them would do a lot to speed up public transit in those cities. Bologna, for example, is planning a pure surface tramway, but grade-separated construction in the historic center would permit trams to have decent coverage there without having to slow down to walking speed.
Are there good examples outside Europe?
Yes! From my original post from 2016, here is one proposal for New York:
The B41 could be a tramway going between City Hall and Kings Plaza, using two dedicated lanes of the Brooklyn Bridge. In that case, the line would effectively act as subway-surface, or more accurately elevated-surface: a surface segment in Brooklyn, a grade-separated segment between Manhattan and Brooklyn. Subway-surface lines should branch, as all current examples do (e.g. Boston Green Line, Muni Metro, Frankfurt U-Bahn), because the subway component has much higher capacity than the surface components. This suggests one or two additional routes in Brooklyn, which do not have strong buses, but may turn into strong tramways because of the fast connection across the river to Manhattan. The first is toward Red Hook, which is not served by the subway and cut off from the rest of the city by the Gowanus Expressway. Unfortunately, there is no really strong corridor for it – the streets are not very wide, and the best for intermediate ridership in Cobble Hill and Carroll Gardens require additional twists to get into the core of Red Hook. Court Street might be the best compromise, but is annoyingly a block away from the F/G trains, almost but not quite meeting for a transfer. The second possible route is along Flushing Avenue toward the Navy Yard; it’s not a strong bus by itself, but the possibility of direct service to Manhattan, if a Flatbush tramway preexists, may justify it.
Note that this proposal is opportunistic: Brooklyn Bridge just happens to be there and point in the right direction for at least one strong surface route in Brooklyn, and conversely would connect too awkwardly to the subway. In a city the size of New York, Stadtbahn lines must be opportunistic – if the region intentionally builds new river crossings then they must carry the highest-capacity mode of transportation, which is rapid transit, not a light rail variant.
American cities smaller than New York are often very big by European standards, but also very decentralized. This hurts the Stadtbahn as a mode – it really only works for a monocentric city, because if there are multiple centers, then all but the primary one get slow transit. The Rhine-Ruhr notably uses the S-Bahn, which is rapid transit, to connect its various cities, and only run Stadtbahn service internally to each center, like Cologne or Dortmund.
There are a number of places in the United States where burying a light rail line in city center is advisable, but this is for the most part conversion of a tram-train to rapid transit, for examples in Portland and Dallas. The only example that come to mind of a decent Stadtbahn in the US that doesn’t already exist is Pittsburgh, converting the BRT system to rail.
Outside the United States, I get less certain. Canada is bad geography for a Stadtbahn because of its use of grid networks; Ottawa may be good for a Stadtbahn using the Confederation Line tunnel, but that’s probably it. Australia may be better, combining decently strong city centers with very low residential density; transit-oriented development potential there is very high, but it could plausibly come around multiple distinct corridors as well as regional rail stations. Melbourne’s tramways thus may be a candidate for Stadtbahn conversion.
In both East Asia and in the developing world, it’s likely best to just build full metros. East Asian cities are big and have high rates of housing construction (except Hong Kong). I can see a Stadtbahn succeed in Taichung, extending the under-construction Green Line on the surface and building intersecting lines, but that’s probably it. Kaohsiung already has a (very underused) subway, what I think is Daejeon’s best next corridor on top of Line 1 and the planned Line 2 is unusually bad for a Stadtbahn because the streets are too gridded west of the center, Daegu is too gridded as well.
A similar set of drawbacks is also true for the developing world. The urban population of the developing world tends to cluster in huge cities. Moreover, these cities tend to have high residential density but low city center job concentration; the Addis Ababa light rail is bad at serving people’s work trips because so few people work in the center. Finally, the developing world has high rates of increase in urbanization, which make future-proofing systems with higher capacity more valuable.
Holidays by Train
What does leisure travel look like in a world where driving and flying are prohibitively expensive, and rail travel is more abundant and convenient?
It does not look exactly like today’s travel patterns except by train. Where people choose to travel is influenced by cultural expectations that are themselves influenced by available technology, prices, and marketing. Companies and outfits providing transportation also market the destinations for it, whether it’s a private railway selling real estate in the suburbs on its commuter lines, an airline advertising the resort cities it flies to, or a highway authority promoting leisure drives and auto-oriented development. The transition may annoy people who have gotten used to a set of destinations that are not reachable by sustainable transportation, but as the tourism economy reorients itself to be greener, new forms of leisure travel can replace old ones.
Historic and current examples
Railroads were the first mode of mechanized transportation, and heavily marketed the destinations one could reach by riding them. The involvement of some railroads in suburban development, such as Japanese private railroads or the original Metropolitan Railway, is fairly well-known to the rail advocacy community. Lesser-known but equally important is rail-based tourism. Banff and Jasper owe their existence to transcontinental railways, Lake Louise was founded as a montane resort on top of the Canadian Pacific Railway, Glacier National Park opened thanks to its location next to the (American) Great Northern. Even Niagara Falls, for all its unique natural beauty, benefited from heavy marketing by the New York Central, which offered the fastest route there from New York.
Other than Niagara Falls, the North American examples of rail-based tourism are all in remote areas, where people no longer travel by train. Some may drive, but most fly over them. The American system of national parks, supplemented by some state parks like the Adirondacks and Catskills, has thus reoriented itself around long-distance leisure travel by car. This includes popular spots like Yellowstone, Bryce, Grand Canyon, and Yosemite in the United States, Schwarzwald in Germany, or the tradition of summer homes in outlying areas in Sweden or the American East Coast.
The airline industry has changed travel patterns in its own way. Planes are fast, and require no linear infrastructure, so they are especially suited for getting to places that are not easy to reach by ground transportation. Mass air travel has created a tourism boom in Hawaii, the Maldives, southern Spain, the Caribbean, any number of Alpine ski resorts, Bali, all of Thailand. Much of this involves direct marketing by the airlines telling people in cold countries that they could enjoy the Mediterranean or Indian Ocean sun. Even the peak season of travel shifted – English vacation travel to the Riviera goes back to the early Industrial Revolution, but when it was by rail and ferry the peak season was winter, whereas it has more recently shifted to the summer.
The politics of vacation travel
In some cases, states and other political actors may promote particular vacation sites with an agenda in mind. Nationalists enjoy promoting national unity through getting people to visit all corners of the country, and if this helps create a homogeneous commercial national culture, then all the better. This was part of the intention of the Nazi program for Autobahn construction and Volkswagen sales, but it’s also very common in democratic states that aim to use highways for nation-building, like midcentury America.
If there’s disputed land, then nationalists may promote vacation travel there in order to instill patriotic feelings toward it among the population. Israel has turned some demolished Arab villages into national forests, and promoted tourism to marginal parts of the country; settler forces are likewise promoting vacation travel to the settlements, cognizant of the fact that the median Israeli doesn’t have strong feelings toward the land in the Territories and wouldn’t mind handing them over in exchange for a peace agreement.
Politics may also dictate promoting certain historic sites, if they are prominent in the national narrative. In the Jewish community, two such trips are prominent, in opposite directions: the first is the organized Israeli high school trips to Poland to see the extermination camps and the ghettos, perpetuating the memory of the Holocaust in the public; the second is Birthright trips for Jews from elsewhere to visit Israel and perhaps find it charming enough to develop Zionist feelings toward it.
So what does this mean?
I bring up the politics and economic history of leisure travel, because a conscious reorientation of vacation travel around a green political agenda is not so different from what’s happened in the last few generations. The big change is that the green agenda starts from how people should travel and works out potential destinations and travel patterns from there, whereas nationalist agendas start from where people should travel and are not as commonly integrated with economic changes in how people can travel.
The point, then, is to figure out what kinds of vacation travel are available by train. Let’s say the map that I put forth in this post is actually built, and in contrast, taxes on jet fuel as well as petrol rise by multiple euros per liter in order to effect a rapid green transition. Where can people go on vacation and where can’t they?
Intercity leisure travel
By far the easiest category of leisure travel to maintain in a decarbonized world is between cities within reasonable high-speed rail range. Tens of millions of people already visit Paris and London every year, for business as well as for tourism. This can continue and intensify, especially if the green transition also includes building more housing in big high-income cities, creating more room for hotels.
High-speed rail lives on thick markets, the opposite of air travel. Once the basic infrastructure is there, scaling it up to very high passenger volumes on a corridor is not difficult; the Shinkansen’s capacity is not much less than 20,000 passengers per hour in each direction. Many people wish to travel to Paris for various reasons, so the TGV makes such travel easier, and thus even more people travel to and from the capital. A bigger and more efficient high-speed rail network permits more such trips, even on corridors that are currently underfull, like the LGV Est network going toward much of Germany or the LGV Sud-Europe Atlantique network eventually connecting to much of Spain.
Germany does not have a Paris, but it does have several sizable cities with tourist attractions. A tightly integrated German high-speed rail network permits many people in Germany and surrounding countries to visit the museums of Berlin, go to Carnival in Cologne, attend Oktoberfest in Munich, see the architecture of Hamburg, or do whatever it is people do in Frankfurt. The international connections likewise stand to facilitate German travel to neighboring countries and their urban attractions: Paris, Amsterdam, Basel, Vienna, Prague.
Intercity travel and smaller cities
Big cities are the most obvious centers of modern rail-based tourism. What else is there? For one, small cities and towns that one encounters on the way on corridors designed to connect the biggest cities. Would Erfurt justify a high-speed line on its own? No. But it has an ICE line, built at great expense, so now it is a plausible place for travel within Germany. The same can be said about cities that are not on any plausible line but could easily connect to one via a regional rail transfer. When I fished for suggestions on Twitter I got a combination of cities on top of a fast rail link to Berlin, like Leipzig and Nuremberg, and ones that would require transferring, like Münster and Heidelberg.
Even auto-oriented vacation sites can have specific portions that are rail-accessible, if they happen to lie near or between large cities. In North America the best example is Niagara Falls, conveniently located on the most plausible high-speed rail route between New York and Toronto. In Germany, South Baden is normally auto-oriented, but Freiburg is big enough to have intercity rail, and as investment in the railroad increases, it will be easier for people from Frankfurt, Munich, and the Rhine-Ruhr to visit.
Farther south, some Swiss ski resorts have decent enough rail connections that people could get there without too much inconvenience. If the German high-speed rail network expands with fast connections to Basel (as is planned) and Zurich (which is nowhere on the horizon), and Switzerland keeps building more tunnels to feed the Gotthard Base Tunnel (which is in the Rail 2035 plan but with low average speed), then people from much of central and southern Germany could visit select Swiss ski resorts in a handful of hours.
The green transition as I think most people understand it in the 21st century is an intensely urban affair. Berlin offers a comfortable living without a car, and as the German electric grid replaces coal with renewables (slower than it should, but still) it slowly offers lower-carbon electricity, even if it is far from Scandinavia or France. Small towns in contrast have close to 100% car ownership, the exceptions being people too poor to own a car. But the world isn’t 100% urban, and even very developed countries aren’t. So what about travel outside cities large and small?
The answer to that question is that it depends on what cities and what railroads happen to be nearby. This is to a large extent also true of ordinary economic development even today – a farming town 20 km from a big city soon turns into a booming commuter town, by rail or by highway. Popular forests, trails, mountains, and rivers are often accessible by railroad, depending on local conditions. For example, some of the Schwarzwald valleys are equipped with regional railways connecting to Freiburg.
Here, it may be easier to give New York examples than Berlin ones. Metro-North runs along the banks of the Hudson, allowing riders to see the Palisades on the other side. The vast majority of travelers on the Hudson Line do not care about the views, but rather ride the train to commute from their suburbs to Manhattan. But the line is still useful for leisure trips, and some people do take it up on weekends, for example to Poughkeepsie. The Appalachian Trail intersects Metro-North as well, though not many people take the train there. Mountains are obstacles for rail construction, but rivers are the opposite, many attracting railroads near their banks, such as the Hudson and the Rhine.
Conversely, while New York supplies the example of the Hudson Line, Germany supplies an urban geography that facilitates leisure travel by rail out of the city, in that it has a clear delineation between city and country, with undeveloped gaps between cities and their suburbs. While this isn’t great for urban rail usage, this can work well for leisure rail usage, because these gaps can be developed as parkland.
Where’s the catch?
Trains are great, but they travel at 300-360 km/h at most. An aggressive program of investment could get European trains to average around 200-240 km/h including stops and slow zones. This allows fast travel at the scale of a big European country or even that of two big European countries, but does not allow as much diversity of climate zones and biomes as planes do.
This does not mean trains offer monotonous urban travel. Far from it – there’s real difference in culture, climate, topography, and architecture within the German-speaking world alone, Basel and Cologne looking completely different from each other even as both are very pretty. But it does limit people to a smaller tranche of the world, or even Europe, than planes do. A Berliner who travels by train alone can reach Italy, but even with a Europe-scale high-speed rail program, it’s somewhat less than 4:45 to Venice, 5:00 to Milan, 5:30 to Florence, 6:45 to Rome, 7:45 to Naples. It’s viable for a long vacation but not as conveniently as today by plane with airfare set at a level designed to redraw coastlines. Even in Italy, there’s great access to interesting historic cities, but less so to coastal resorts designed around universal car use, located in topographies where rail is too difficult.
The situation of Spanish resorts is especially dicey. There isn’t enough traffic from within Spain to sustain them, there are so many. Germany is too far and so is Britain if planes are not available at today’s scale. What’s more, people who are willing to travel 7 or 8 hours to a Spanish resort can equally travel 5 hours to a French or Italian one. The French Riviera has gotten expensive, so tourism there from Northern Europe feels higher-income to me than tourism to Alicante, but if people must travel by train, then Nice is 4:30 from Paris and Alicante is 7:30, and the same trip time difference persists for travelers from Britain and Germany.
Is it feasible?
High carbon taxes are not just economically feasible and desirable, but also politically feasible in the context of Europe. The jet fuel tax the EU is discussing as part of the Green Deal program is noticeable but not enough to kill airlines – but what environmental policy is not doing, the corona virus crisis might. If low-cost air travel collapses, then much of the market for leisure travel specifically will have to reorient itself around other modes. If Europe decides to get more serious about fighting car pollution, perhaps noticing how much more breathable the air in Paris or Northern Italy is now than when people drive, then taxes and regulations reducing mass motorization become plausible too.
The transition may look weird – people whose dream vacation involved a long drive all over Italy or France or Germany may find that said vacation is out of their reach. That is fine. Other vacations become more plausible with better rail service, especially if they’re in big cities, but also if they involve any of a large number of natural or small-town destinations that happen to be on or near a big city-focused intercity rail network.
Incoming Gantz-Led Government to Invest in Israel’s Infrastructure
Israel’s incoming prime minister Benny Gantz unveiled an emergency government, to take power following an upcoming confidence vote in the Knesset. The last two MKs required to give Gantz a 61-59 majority, two members of Gantz’s own Blue and White Party who were previously resolute not to go into coalition supported by the mostly Arab Joint List, relented after Gantz’s controversial attempt to enter a Netanyahu-led emergency unity government stalled due to disagreements over both security and coronavirus policy. Moreover, following revelations of government failures discovered last week by senior B&W MK Ofer Shelah, the new government announced sharp changes in policy toward both the Covid-19 emergency and broader domestic and foreign policy questions.
Of note, a major reshuffle in the state budget is expected. Some details are forthcoming, but short- and long-term reductions in settlement subsidies are expected. Moreover, reductions in subsidies to yeshiva students have been announced, delayed by a year due to the magnitude of the crisis within the Haredi community, which has 10% of Israel’s population but about half of Covid-19 hospitalization cases. Finally, a review of military procurement will be done due to the influence of the indicted Netanyahu on the process, but analysts expect that with so many former generals in the new government, including former IDF chief of staff Gantz himself, few real cuts to the IDF are forthcoming.
In lieu of these cuts, the new government is announcing a massive infrastructure investment program, funded partly by deficit spending to limit unemployment. Incoming health minister Ahmad Tibi of the Joint List, a medical doctor by training, promised that budget increases will invest in hospital capacity and hygiene, raise the wages of staff from doctors down to cleaning staff, and buy personal protective equipment (PPE) in sufficient quantities for universal mask-wearing. Outside health, energy and transportation are both on the list of budgetary winners. In energy, the collapse of the consortium of Yitzhak Tshuva and Noble Energy managing Israel’s natural gas reserves and the falling prices of solar power mean the state will invest in thermal solar power plants in the desert. In transportation, an infrastructure plan will invest in additional urban public transit capacity.
The situation of transportation is particularly instructive, because of the political element involved. Throughout most of the past 11 years of Netanyahu’s coalitions, the transport minister was the same politician, Yisrael Katz of Netanyahu’s Likud; Katz prioritized highway investments with some rail, and was viewed as the least controversial of Likud’s heavyweight politicians, many of whom find themselves embroiled in scandal following last month’s election. Nonetheless, to signify a break with the past, the new government is giving the transportation portfolio to Nitzan Horowitz, leader of the leftist Meretz party who has called for expansion of public transportation.
While car ownership in Israel is low, this is the result of car taxes and high poverty rates. Activists at Meretz, B&W, and the right-wing secular Yisrael Beitenu party all pointed out to religious laws banning public transportation and other services from running on Saturdays, promising to repeal them within months. Meretz activists as well as independent analysts expect everyday public transportation to encourage people to give up driving and rely on buses and trains more even on weekdays, requiring additional investment to cope with capacity.
Another political element identified by sources within B&W who spoke anonymously is that residents of Tel Aviv and most of its inner suburbs have long felt stiffed by state infrastructure plans; last decade, Mayor Ron Huldai clashed with Katz, demanding a subway in dense, upper middle-class North Tel Aviv. Meretz is especially strong in North Tel Aviv. However, Horowitz said that his priority was socioeconomic equality, and while he did favor subway expansion in and around Tel Aviv and would accelerate construction of the Green Line through North Tel Aviv, the budget would boost rail construction in working-class southern and eastern suburbs.
Several MKs at the Joint List added that there would also be additional funding for connections to the centers of Arab cities. One plan calls for a tunnel through Nazareth, Israel’s largest Arab-majority city, which would connect it with Tel Aviv and other larger Jewish cities while also functioning as a regional rail link for the majority-Arab Galilee region. Towns too small to justify a direct rail link would get a bus to the nearest train station on the same fare system with a timed connection. One Meretz member explained, “in unbroken countries of similar size to ours, like Switzerland and the Netherlands, bus and train planning is coordinated nationally and there is no conception that buses are for poor people and trains for rich people.” Members of both Meretz and the Joint List added that there had long been underinvestment in Arab areas, calling past policies racist and vowing to correct them.
Sources at B&W stressed that there’s short and long term. In the short term, the priority will remain the coronavirus crisis, and the state will go into a large deficit in order to invest in health care and limit the death toll. Additional spending on other infrastructure will focus on planning, so that the state can begin construction after the crisis is long over, and will be funded by reducing yeshiva funding; B&W and Yisrael Beitenu plans to also reduce child credits, as Haredi families are larger than secular ones, have stalled due to opposition by the Joint List, as Arab families are poor and larger than secular Jewish ones too.
While Gantz himself stressed the pragmatic aspects of the plan, sources close to him mentioned the spirit of the 1990s. Negotiations with the Palestinians will resume shortly, they promised, and a two-state compromise will be worked out. They further promise that the peace dividend will allow Israel to grow through closer trade ties with the Arab world and reduced ongoing security spending. But other sources within the new coalition are more skeptical, pointing out Gantz and Yisrael Beitenu leader Avigdor Lieberman’s trenchant opposition to dismantling most settlements as a red line that may scuttle future negotiations.
Nonetheless, all sources agree that a clear change in foreign and domestic policy is coming. The more skeptical sources say that the end result will be a shift in domestic spending building a more expansive urban rail network and higher-quality health care. But the more idealistic ones are saying that a new Middle East is coming, one in which a thriving Israel will be at the center, with world-class public infrastructure and private entrepreneurship.
Outlying S-Bahn Tunnels
There’s a thread on Twitter by Stephen Smith bringing up Zurich’s S-Bahn as an alternative to extensive metro tunneling. It reminded me of something I’d been meaning to write about for a long time, about how S-Bahn tunnels, in Zurich and elsewhere, include not just the bare minimum for through-running but also strategic tunneling elsewhere to reach various destinations not on the mainline. Zurich’s S-Bahn includes about 19 km of tunnel built since the 1960s, which is similar per capita to the amount of tunneling built for the Washington Metro.
Such tunneling is important to ensure a regional rail network reaches destinations off the mainlines. Even cities with metro systems need to understand this as long as they have some mainline rail serving suburban destinations. For example, in the Center of Israel, Tel Aviv is getting a subway-surface light rail network, but outside the urban core rail transport will remain dominated by Israel Railways service; as Israel Railways avoids many city centers, such as Netanya, short strategic tunnels are critical.
Tunnels in Zurich
The core of the Zurich S-Bahn is three city center tunnels: the 2 km Käferberg Tunnel from Oerlikon to Hardbrücke, the 7 km combination of the Hirschengraben Tunnel and the Zürichberg Tunnel from Hauptbahnhof to the Right Bank of Lake Zurich and points northeast, and the 5 km Weinberg Tunnel from Hauptbahnhof to Oerlikon and points north. The Käferberg Tunnel is from the 1960s, the Hirschengraben and Zürichberg Tunnel opened in 1989-1990 as the core of the Zurich S-Bahn, and the Weinberg Tunnel opened in 2014 as a second S-Bahn route to add more capacity.
These 14 km of tunnel look like any standard picture of regional rail tunneling. However, Zurich has in addition built a 5 km tunnel for a loop to the airport. Without this tunnel, no regional or intercity rail service to the airport would have been possible, as the airport was at a distance from the mainline; only trams could have served the airport then.
In addition to these 19 km, there is some talk of building an additional tunnel of 7-10 km on the Zurich-Winterthur Line, called the Brüttener Tunnel, to speed up service between these two cities.
Tunnels on other regional rail systems
In Paris, the RER consists not just of legacy rail track and city center tunnels, but also outlying tunnels reaching new destinations. The RER B connection to Charles de Gaulle Airport is new construction, opening in 1976 as a commuter line just before the RER opened and incorporated it as a branch. It’s a mix of above- and underground construction, totaling 5.5 km of tunnel. Two more key RER lines, at both ends of the RER A, are new: the branch to Cergy, which opened between 1979 and 1994 and has 3 km of tunnel, and the branch to Marne-la-Vallée, which opened in stages starting on the same day as the RER A’s central tunnel and continuing until reaching its terminus in 1992.
All three new RER branches are busy. They have to be – if there weren’t so much demand for them, it would have been financially infeasible to build them and those areas would have had to make do with a bus connection to the existing mainlines. The Marne-la-Vallée branch carries about two thirds of the eastern branch ridership of the RER A, making it most likely the busiest single rail branch in Europe.
In London, the regional rail network is less modern than in Paris, Zurich, and other cities with extensive development of new tunnels. Nonetheless, the Crossrail plans do include a short outlying tunnel reaching Heathrow Airport. Moreover, one of the two eastern branches of the mainline has the characteristics of an outlying tunnel, namely the branch to Canary Wharf. Canary Wharf is only 5 km from the City of London and the tunnel connecting to it is contiguous with the central tunnel, but the branch is not really about improving connections to onward suburbs. Where La Défense was always on the way to western suburbs on the RER, Canary Wharf is only on the way to Abbey Wood. There are proposals among area railfans to extend this branch much farther to the east, but no official plans that I know of. In the currently planned paradigm for Crossrail, Canary Wharf is purely a destination.
In Munich, there is a new line toward the airport, with some tunneling on airport grounds as well as at two intermediate suburban stations. There is also a short above-ground spur connecting the airport to the western side of the S-Bahn, giving it two different routes to city center. Finally, there is a short tunnel slightly to the west of the main trunk tunnel to better connect S7 to the mainline.
Why are airports so prominent on this list?
The concept of using strategic tunnels to build new spurs and loops to connect mainlines to new destinations has nothing to do with airports. And yet, so many of these spurs connect to airports: Charles de Gaulle, Heathrow, Zurich, Munich. There are many more such examples, on regional or intercity lines: Schiphol, Arlanda, Ben-Gurion, soon-to-be Berlin-Brandenburg, Barajas. Why is that?
The answer is that the purpose of a spur or loop is to connect to a destination off the mainline. European cities for the most part developed around the railway or metro line. Virtually every important destination in London is on a legacy railway because during the city’s 19th and early 20th century growth period, the railway was the only way to get to Central London. Airports are consistent exceptions because they’re so land-intensive that it’s hard to site them near existing railways.
Where non-airport destinations somehow had to be developed away from the mainline, they’re attractive targets for spurs as well. Canary Wharf sits on the site of a disused dock, which generated some freight rail traffic but little demand for passenger rail. Cergy is one of several new towns built around Paris to act as suburban growth nodes, together with Marne-la-Vallée and Évry (served on a loop of the RER D).
In smaller cities than Paris and London, suburban growth often came together with a metro line. In Stockholm, the Metro was planned together with public housing projects, so many of the Million Program projects are right next to stations, facilitating high public transportation usage. There’s usually no need to build many new regional rail spurs, because such sites are close enough to the center for metro service to be quick enough.
The situation of regional rail in Israel
In Israel, urban development has ignored the railway almost entirely. The colonial network was weak and barely served the state’s travel needs. Investment was minimal, as the state’s political goals were population dispersal and Judaization of peripheral areas rather than efficient transportation. Towns were built around the road network, connected to one another by bus since people were too poor to afford cars.
Rail revival began in the early 1990s with the opening of the Ayalon Railway, providing through-service between points north and south of Tel Aviv. In the generation since, ridership has grown prodigiously, albeit from low initial levels, and the state has built new lines, with an ongoing project to electrify most of the passenger network. However, since the cities came first and the trains second, the new lines do not enter city centers, but rather serve them peripherally near the highway, often surrounded by parking.
Thus, Netanya’s train station is located to the east of the city’s built-up area, on the wrong side of the Route 2 freeway. Ashdod’s train station is on the periphery at a highway interchange, well to the east of city center. Ashkelon’s station is on the eastern margin. The under-construction line through Kfar Saba and Ra’anana passes just south of the built-up area.
In all of these cases, doing it right would require, or would have required, just short, strategic elevated or underground lines:
- Netanya is at the northern end of the Tel Aviv commuter rail network, and so it can easily be served by a spur. The existing station can be retained as a junction for intercity rail service, but building a commuter rail spur would not compromise frequency. Such a spur would require no more than 2 km of tunnel.
- In Ashdod and Ashkelon, there are north-south arterials that are so wide, 50-60 meters, that they could host cut-and-cover subways, effectively moving the line to the west to serve those cities better. In Ashdod there is a decision between going under B’nai Brith, which offers a more convenient through-route, and Herzl, which is more central but requires some boring at the southern end of the city.
- In Kfar Saba and Ra’anana, about 8 km of tunnel under Weizmann and Ahuza are needed, and could potentially be done cut-and-cover as well, but these streets are 30 meters rather than 50 meters wide. Such a route would replace the under-construction combination of a freeway and railway.
- In Rishon LeZion, a 6km route, not all underground, is needed to connect Rishonim with Moshe Dayan via city center and the College of Management rather than via the under construction freeway route avoiding these destinations.
Unfortunately, so far the state’s investment plans keep skirting city centers. It serves them with a cars-and-trains paradigm, which assumes the rail passenger is driving or riding a bus to the train station, never mind that in that case it’s more convenient to drive all the way to one’s destination. This suppresses ridership; not for nothing, the busiest station outside metropolitan centers is Rehovot, with 2.1 million annual entries, and not Ashdod, which is second with 1.9 million. Ashdod is a city of 220,000 and Rehovot one of 140,000, but Rehovot’s station is far more walkable. Were Ashdod not poor, few people would use the station at all – they’d all just drive.
High-Speed Rail in Small, Dense Countries
Four years ago I brought up the concept of the small, dense country to argue in favor of full electrification in Israel, Belgium, and the Netherlands. Right now I am going to dredge up this concept again, in the context of intercity trains. In a geographically small country, the value of very high speed is low, since trains do not have stretches of hundreds of kilometers over which 300 km/h has a big advantage over 200 km/h; if this country is dense, then furthermore there are likely to be significant cities are regular intervals, and stopping at them would eliminate whatever advantage high-speed rail had left.
Nonetheless, unlike with electrification, with high-speed rail there is a significant difference between Israel and the Low Countries. Israel does not have economic ties with its neighbors, even ones with which it does have diplomatic relationships, that are strong enough to justify international high-speed rail. Belgium and the Netherlands do – the high-speed rail they do have is already internationally-oriented – and their problem is that they have not quite completed their systems, leading to low average speeds.
The situation in Israel
Israel is a country of 20,000 square kilometers, with about 9 million people. Both figures exclude the entirety of the Territories, which are not served by intercity trains anyway, and have such geography that not even the most ardent annexationists propose to build any.
The country is long and narrow, and the maximum north-south distance is almost 500 km, but the cities at the ends are very small, and the population density in the South is exceptionally low. Eilat, at the southern tip of the country, is a city of 52,000, and is 170 km from the nearest Israeli city, Dimona. A low-speed line for freight may be appropriate for this geography, offering an alternative to the Suez Canal, but there is no real point in investing in high passenger rail speed. For purposes of fast intercity trains, the southern end of Israel is Beer Sheva, less than 100 km from Tel Aviv.
In the Galilee the situation is not quite as stark. The main barrier to intercity rail development is not low population density – on the contrary, the Galilee averages around 400 people per km^2, not counting the Golan Heights. Rather, the physical and urban geographies are formidable barriers: the mountainous topography forces all railroads that want to average reasonable speed to tunnel, and the cities are not aligned on linear corridors, nor are there very large agglomerations except Nazareth, which is about 100 km north of Tel Aviv. A low-speed rail network would be valuable, tunneling only under mountainous cities like Nazareth and Safed, but even 200 km/h in this region is a stretch, let alone 300. Thus, just as the southern limit of any fast intercity rail planning in Israel should be Beer Sheva, the northern limits should be Haifa and Nazareth.
The box formed by Haifa, Nazareth, Jerusalem, Tel Aviv, and Beer Sheva, less than 200 km on its long side, is not appropriate geography for high-speed rail. It is, however, perfect for medium-speed rail, topping at 160 or 200 km/h. The Tel Aviv-Jerusalem high-speed line, built because the legacy line is so curvy that it is substantially slower than a bus, only runs at 160 km/h for this reason – the distance along the railway between the two cities is 57 km and there’s an intermediate airport stop, so the incremental benefit of running faster is small. The Tel Aviv-Haifa line, built in stages in the 1930s and 50s, runs in the Coastal Plain and is largely straight, capable of 160 km/h or even faster. The Tel Aviv-Beer Sheva line is slower, but it too can be upgraded. In all of these cases, the target average speed is about 120 km/h or perhaps a little faster. A high-speed train would do better, but reducing trip times from 40 minutes to 30 just isn’t worth the expense of a new line.
Nazareth is the odd one out among the major cities, lacking a rail connection. This is for both geographical and sociopolitical reasons: it is on a hill, and it is Arab. Reaching Nazareth from the south is eminently possible, on a line branching from the Coastal Railway in the vicinity of Pardes Hanna, continuing northeast along Route 65 through Kafr Qara and Umm al-Fahm, and entering the city via Afula. Modern EMUs can climb the grades around Umm al-Fahm with little trouble, and only about 4 km of tunnel are required to reach Nazareth, including a mined underground station for the city. Continuing onward requires perhaps 8 km of tunnel.
However, so far Israel Railways has been reticent to enter city centers on tunnels or els. Instead, it serves cities on the periphery of their built-up areas or in freeway medians. It would require little tunneling to enter the center of Netanya or Rishon LeTsiyon, and none to enter that of Ashdod or Ashkelon. This is the result of incompetence, as well as some NIMBYism in the case of Rishon. Nonetheless, such short tunnels are the right choice for regional and intercity rail in those cities as well as in Nazareth, which poor as it is remains the center of Israel’s fourth largest urban agglomeration.
What if there is peace?
In Belgium and the Netherlands, there is 300 km/h high-speed rail, justified by international connections to France and Germany. What if Israel reaches a peace agreement with the Palestinians that thaws its relationships with the rest of the Arab world, justifying international connections to present-day enemy states like Syria and Lebanon as well as to cold friends like Jordan and Egypt?
The answer is that the Levant writ large, too, is a relatively small, dense area. The Palestinian Territories have even higher population density than Israel, as does Lebanon. Jordan and Syria, on the desert side of the mountains, are less dense, but if one drops their low-density areas just as one would drop Israel south of Beer Sheva, the box within which to build intercity trains is not particularly large either.
Amman is 72 km from Jerusalem; it’s an attractive target for a continuation of the Tel Aviv-Jerusalem railway at 160-200 km/h, the main difficulty being the grades down to and up from the Jordan Valley. Beirut and Damascus are both about 240 km from Tel Aviv on the most likely rail routes, via the coast up to Beirut and via Nazareth and Safed up to Damascus. The only connection at a truly compelling distance for 300 km/h rail is to Aleppo, which is not large enough and is unlikely to generate enough ridership across the language and political barrier to be worth it.
Egypt presents a more attractive case. Cairo is enormous, and there is a whole lot of nothing between it and the Gaza Strip, a perfect situation for high-speed rail. However, this is firmly in “we’ll cross that bridge when we get to it” territory, as none of the required construction really affects present-day Israeli intercity rail planning. It’s not like the Levantine Arab capitals, all of which lie along extensions of important domestic Israeli routes.
Integrated timed transfers
The Netherlands and Switzerland both have national rail networks based on the idea of an integrated timed transfer, in which trains from many destinations are designed to reach major nodes all at the same time, so that people can connect easily. In Switzerland, trains arrive at every major city just before :00 and :30 every hour and depart just after, and rail infrastructure construction is designed to enable trains to connect cities in integer multiples of half hours. For example, since trains connected Zurich and Basel with Bern in more than an hour, SBB built a 200 km/h line from Olten to Bern, shortening the trip time to just less than an hour to facilitate connections. Every half hour this line carries a burst of four trains in seven minutes in each direction, to ensure trains from many different destinations can connect at Bern at the right time.
I have argued against this approach in the context of Germany, proposing high–speed rail instead specifically on the grounds that Germany is a large country with many pairs of large cities 500 km apart. In the context of the Netherlands, the integrated timed transfer approach is far superior, which is why it is adopting this approach and refining it in ways that go beyond Switzerland’s decentralized planning. Belgium, too, had better adapt the Swiss and Dutch planning approach. What about Israel?
In Israel, timed transfers are essential to any intercity rail build-out. However, a fully integrated approach is more difficult, for three geographical and historical reasons. First, most intercity traffic flows through one two-track mainline, the Coastal Railway. Using advanced rail signaling to permit many trains to enter Tel Aviv at once is fine, but it would not be the everywhere-to-everywhere system of more polycentric countries like Switzerland.
Second, Israeli metro areas are really a mixture of the mostly-monocentric contiguous sprawl of France and the Anglosphere and the polycentric regions of distinct cities of the Netherlands and the German-speaking world. Jerusalem’s agglomeration is entirely Anglo-French in this typology, without significant independent cores, and Tel Aviv and Haifa both have substantial Anglo-French cores ringed by far less important secondary centers. The significant secondary centers around Tel Aviv and Haifa are edge cities within the built-up area that may be near a rail line, like Herzliya Pituah and the Kiryon, but are never independent town centers like the various Randstad and Rhine-Ruhr cities.
And third, Israel completely lacks the large railway terminals of Western countries that built their mainlines in the 19th century. Integrated pulses require one station track per branch coming out of the station, since the point of such timetables is to have trains from all branches arrive at the station at once. Within Germany there is criticism of the Stuttgart 21 project on the grounds that the new underground Stuttgart station will only have eight tracks, whereas there are about 14 planned branches coming out of the city.
So does this mean timed transfers are a bad idea? Absolutely not. Israel Railways must plan around timed transfers at junction stations like Lod, the closest thing the Tel Aviv region has to a German-style secondary core, as well as at future branch points. Entering secondary city centers like Netanya and Ashdod would involve tunnels and els, but more significantly to the national network, these would all be branches, and adding more branches to the mainline would require planning better transfers at the branch points and in the center.
Moreover, Israel still has significant intercity bus service, and most likely always will. Timed connections between buses and trains at outlying terminals like Ashdod are a must, and nationwide coordination of bus schedules to enable such connections is a must as well.
Intercity rail for a small, dense country
The situation in Israel – as in Belgium and the Netherlands – favors a different kind of rail development from that of larger countries like France and Japan. Short distances between major urban areas, frequent stops for intermediate cities, and cities that are not really located along easy lines call for the following design principles:
- The maximum speed should be 160-200 km/h – lines should not be designed for higher speed if that requires more tunneling or bypassing existing mainlines, unless there is a compelling international link.
- All trains should be electric, and run electric multiple units (EMUs) rather than locomotives, making use of EMUs’ fast acceleration to serve many stops.
- Significant cities that do not have rail links or have circuitous links should get new lines, using short tunnels or viaducts if necessary to reach their centers.
- Transfers at junction stations should be timed, as should transfers between buses and trains in cities with significant travel volumes to areas not served by the railway.
- The state should coordinate timetables and fares at the national level and engage in nationwide integrated planning, since a change in one city can propagate on the schedule 100-200 km away.
In Israel, public transportation planners understand some of these points but not others. Rail planning is based on medium rather than high speed; there are some calls for a high-speed train to Eilat, but so far what I’ve seen is at least partly about freight rather than passengers. The state is electrifying most (though not all) of its rail network – but it’s buying electric locomotives as well as EMUs. New rail lines go in freeway medians and on tangents to built-up areas, as if they were 300 km/h lines, rather than low-speed regional lines for which if people have to drive 5 km they may as well drive the remaining 50 to their destination. Schedule coordination is a mess, especially when buses are involved.
Going forward, Israel should aim to have what the Netherlands has, and even more, since the Netherlands has not fully electrified its network, unlike Switzerland. Israel should aim for very high traffic density, connecting the major cities at a top speed of 160-200 km/h and average speed of about 120 km/h, with easy transfers to slightly slower regional lines and to buses. Its cities may not be Tokyo or Paris, but they’re large enough to generate heavy intercity traffic by public transportation, provided the rail network is there.
Difficult Urban Geography Part 2: Hilly Topography
This is the second and last part of a series about difficult urban geography for public transit, following a Patreon poll. Part 1 covers narrow streets.
A few years ago, Sandy Johnston remarked that Jerusalem had the least gridded street network he ever saw, and this complicates any surface transit planning there. At the time he was familiar with New England already, but Jerusalem seemed different.
Here are street maps of West Jerusalem and Boston, at the same scale:
Boston has some gridded sub-areas, like Back Bay, but Downtown Boston is as messy as Jerusalem, and on the level of arterial streets, even the rest of the city isn’t too different. The real issue affecting Jerusalem is the hilly topography. Once one gets out of the core of West Jerusalem, the city turns into a mess of hills with internal street networks and poor connectivity between them. Boston maintains a coherent structure of arterial streets that host buses and tramways, with a cobweb structure that feeds the subway efficiently; in Jerusalem, there is little chance of that.
Surface vs. rapid transit
Rapid transit is mostly insensitive to hills. A subway can be built across hills, partly underground, partly elevated. This is the case in Upper Manhattan, where the 1 train runs in a mix of cut-and-cover subway, elevated structures, and mined deep-level tunnel.
Even if the hills slope down into the natural arterial, this is not such a problem. Train stations can incorporate escalator access and have exits at different elevations. New York manages this in the same neighborhood where the 1 runs, in Washington Heights, on the A train. Monaco, on a sloping hill, manages the same at its train station, which is located underground, using elevator access from multiple neighborhoods at different altitudes.
The deep mining required for such construction doesn’t even raise costs that much. If it’s possible to secure horizontal access to the station site, construction becomes easier. Moreover, running elevated through the valleys, as the 1 does in Manhattan Valley and Inwood, cuts costs rather than increasing them.
Evidently, the hilliness of Rome has not prevented the city from building a subway. Line C’s construction costs were very high, but not because of topography but because of millennia-old archeology, which is not really a question of the street network.
Since rapid transit is not affected as much by hills as surface transit, a city with hilly topography should be biased toward rapid transit and against surface transit. This does not mean every flat city should be content with surface transit and every steep city should build subways and els, but it does mean that the population and density thresholds for rapid transit are smaller in hillier cities.
Some cities are very hilly, but this does not affect their street networks. San Francisco is famous for this: north of Market, in neighborhoods like Telegraph Hill and Russian Hill, the street grid continues mostly uninterrupted, and the result is famously steep streets. In these cities, transit network planning need not pay much attention to the topography: the only concession that need be made is that agencies should preferentially electrify and run trolleybuses, which have better hill-climbing performance than diesel buses – as San Francisco Muni in fact has, retaining trolleybuses rather than replacing them with diesels as nearly all other American cities have.
The more interesting and difficult case is when the street network respects the hills. It can naturally turn the city’s street layout into that of multiple distinct pods, each surrounding a different hill. This is popular in Jerusalem, especially the settlements within East Jerusalem, but also in some of the newer parts of West Jerusalem. There is not much connectivity between these different pods: there may be a single arterial road with the rest of the city, as is the case for the settlements of Pisgat Ze’ev, Ramot, and Ramat Shlomo.
This kind of pod development is popular in a lot of auto-oriented suburbia. The cul-de-sac is a defining feature of many an American suburb. However, in Jerusalem we see it happen even in the context of a dense city: Jerusalem proper has a density of 7,200 people per square kilometer, and all the settlements in question are within the jurisdiction of the city. It comes out of a combination of modernist central planning (Israeli neighborhoods and cities are designed top-down, rather than expanding piecemeal as in North America or France) and the hilly terrain.
Transit planning for such a city is a chore. In theory, choke points are good for transit, because they have high intensity of travel, where dedicated lanes can make buses very efficient. In practice, choke points work for transit only when there are coherent corridors on both sides for the buses to feed. For example, on a wide river spanned by few bridges, buses can run on the bridges, and then continue on the arterials feeding them on either side. Pod development, in contrast, has no coherent arterials within each pod, just collector roads feeding the main drag. Buses can still run on these streets, but there is no structure to the density that encourages them to serve particular locations and not others.
One solution is a type of transit that is overused in flatter cities: the direct express bus, or open BRT. This bus runs local within each pod and then continues on the arterial, making few stops; it could run as open BRT if the arterial has enough development to justify such service, or as a nonstop express service if it is a full freeway. This form of transit developed for both low-density American suburbia and Israeli pod development towns (where this is buttressed by the tendency of the ultra-Orthodox to travel in large families, in which case transfer penalties are much higher, encouraging low-frequency direct service).
Another solution is to go in the air. Gondola lifts are seeing increasing use in extremely hilly cities, where surface transit must wend its way through switchbacks. Medellin’s Metrocable has a vertical rise of 400 meters. Even in cities that are less steep, gondolas could be a solution if arterial roads are simply not available. In the Arab neighborhoods of East Jerusalem, arterials are rarely available, and gondolas bridging ravines could be of use. Gondolas could also be useful for neighborhoods that are only connected by arterial in a radial rather than circumferential direction – they could again bridge ravines to connect peripheral neighborhoods to one another rather than just to the center.