Category: Germany

The Limit of Circles in the Suburbs

In dense urban cores, it’s valuable to run circular rail lines. They connect dense near-center neighborhoods to one another without going through the more congested center, and help make transferring between parallel lines more efficient, again through avoiding central business district congestion. Some of the largest cities in the world even support multiple circles, line Lines 2 and 10 in Beijing, or the various overlapping circles of Moscow, Tokyo, and soon Paris. However, this system of radial lines through the center and circular lines around the center cannot go on forever. There is a limit to how far out one can build circles, which is much sharper than the limit of how far radial lines can go. Lower-density suburbs can have radial lines connecting them to city center or to near-center nodes of activity, but circumferential lines are likely to be weak.

For a concrete example, take Berlin. It has the Ring through fairly dense neighborhoods, supporting 5-minute frequency on the S-Bahn during most of the day. But it also has the Outer Ring, built in the 1950s through East Berlin and the Brandenburg suburbs to surround West Berlin and permit the construction of the Wall; today it runs regional trains, and one segment through East Berlin runs the S75 every 10 minutes, but there is no train making the entire orbit, just trains using short segments to position themselves to a better radial entry into the center of Berlin. It looks frustrating – there is circular infrastructure, why not use it? But there’s a solid reason not to run it as a true circle.

See map below:

A schematic of service patterns can be seen here.

The line’s origin as a bypass means it doesn’t serve any of the nodes near its radius, like Potsdam (too built-up), Spandau (in West Berlin), or Märkisches Viertel (also in West Berlin). The only node it does pass through is the soon-to-close Schönefeld airport, which only became important well into the Cold War; moreover, a branch parallel to the line to the southeast serves the soon-to-open Berlin-Brandenburg Airport, with plans to run many different kinds of regional services entering Berlin from both the Stadtbahn and the North-South Main Line. So a circular service would, by itself, just connect various outlying areas like Marzahn, Hennigsdorf, and Falkensee to the airport. By itself, this doesn’t support very high frequency.

Now, what the line could do is work as a network together with radial lines, connecting to them to facilitate travel not passing through the center of Berlin. However, there is not much point in transfers unless they are either high-frequency or timed. High-frequency transfers are out – the radial lines that penetrate the Outer Circle run 2-3 trains per hour. This forces the transfers to be timed.

Timed connections on lines that intersect crosswise rather than parallel with cross-platform transfers are completely possible. The trains can’t be too long, but that’s fine, a 4-car train with stair and elevator connections could have 2-3 minute transfer windows and still exchange passengers in all directions. It’s worth establishing at sufficiently important stations where a cross-platform transfer is not possible; as a four-way transfer, it’s not even that much more involved than a cross-platform transfer with timed wrong-direction transfers like Wittenbergplatz between U2 and U1/3. However, this is for one station.

All of this goes out the window when a circle intersects 12 different radial lines. Such a scheme can only work if all of the transfers are timed, or at least a large majority of them. Otherwise, people might as well take the train through the center and connect at Berlin Hauptbahnhof, or even stay on the same train if it runs through like RE 1 or RE 3.

In theory, you can time a short succession of transfers on the same line. All it really takes is to make sure that the circular line takes a half-integer multiple of the takt interval between every pair of transfer points, allowing both-direction transfers everywhere. On a few stretches of the line, it’s even plausible, with a 20-minute takt – the line would be fast because it’s so far out and has to few stops, so 7-10 km in 8 minutes (10 minus 2 for the transfer window) is not outside the realm of possibility.

Except that some segments between transfer points are still bad, like between the two just west of Spandau, or on both sides of the crossing with S5 and RE 1 in Lichtenberg. And even if they weren’t, this runs into the problem that trains are not infinitely punctual. Having 12 knots between a circular line and radials around Berlin, or even just 10 if weak ones are dropped, means that suburban Berlin would have more knots every 20 minutes than Switzerland has today every half hour (8), and not too many fewer than Switzerland is planned to have every half hour in the 2030s. The required schedule discipline is intense, especially in a big city defined by crowded rush hour trains.

This has implications elsewhere. Paris has its Grande Ceinture, which is tempting for a regional rail ring, but the frequency at which it can support a full RER line is not high; instead, the region is breaking the line into segments, to be turned over into tram-trains, with some segments diverging from the mainline to serve nodes near but not on the line.

In general, what this means is that if you’re not connecting to a major city center, there’s only so much service you can run. If you’re within the densely built-up area, as the Ring is or as the various orbitals Paris has (M2/M6, T3) or plans (M15), then it’s fine – untimed transfers are fine when trains come every 5 minutes, and overlapping one-seat rides like Prenzlauer Berg-Neukölln and Ostkreuz-Tempelhof and so on can help fill the train as well. But once frequency drops below about a train every 10 minutes, untimed transfers no longer work, which means that services that rely on connections only work if the connections are at a handful of key points, not at 12 different radii around the city.

Eliminate Local Government

What is the purpose of having any local government? So much local activism just takes it for granted that the local is superior to the national or the global. “It’s a tight-knit neighborhood” is supposed to evoke positive feelings, and not, say, close-minded local notables whose oyster is a few square kilometers. So instead of this, let me positively propose that there should not exist government below the level of the state, or the province in a federal system. Cities like New York or Munich should just be places on a map, subject to a one state, one law principle.

Some of this comes from the realization that there is no federalism in a pandemic, and that if the EU were the leviathan state of the imagination of British tabloid readers, the EU would’ve had Japanese or Korean infection rates. (For one, in the first week of March there was widespread “it’s just Italy, it doesn’t affect us” sentiment in Germany.) But this is not really about corona. Localism causes a lot of other problems, which go away at the national and provincial levels whereas pandemics do not.

Physical issues

Progress does not come from localism. Housing, for example, is generally more plentiful when decisions are made at a higher level. Zoning is a national law in Japan, and the national government does not care about the opinions of local NIMBYs and therefore has made it easy to build more housing on your own property. (Takings, in contrast, are extremely hard in Japanese law, which has driven up urban transportation construction costs.)

Infrastructure is in theory more workable at the local level. In the past, municipalities built great public transportation and water works. But that is in decline now thanks to the growth of metropolitan areas with broader linkages. In the United States, this was already evident in the late 1930s and early 1940s, in the context of road construction: there was extensive high-income suburbanization in New York already, and each of the suburbs wanted easy road access to Manhattan jobs but did not want to be drive-through country for suburbs farther out. There were political fights over regional planning at the time, and eventually the solution that emerged, enabling regional road planning while protecting the privileges of wealthy suburbs, was Robert Moses’s arbitrary government; once the roads were built, he was no longer necessary, and it became possible to revert to empowering every wealthy community.

And that history is one of roads. Public transportation requires more coordination between different levels of government. Germany divides itself into broad metropolitan regions with their own transport associations, but in some places like Frankfurt and the Rhine-Neckar region they overlap, and even though the boundaries do not conform to state lines except in the Berlin-Brandenburg region and probably North-Rhine-Westphalia, there is no need for local government to exist either.

Tiebout’s law

The idea that people vote with their feet to choose the government they’d like is powerful, and makes a lot of sense at the national and provincial level. I can avoid Bavaria and go to Berlin’s more welfare state-oriented system. But this stops at that level. At the local level, such a broad choice makes no sense. Were the various neighborhoods of Berlin their own autonomous zones like American suburbs, with local tax base, the difference between their provision of services would not be about choice, but about resources. It’s much easier for rich people to cluster in one part of the region, be it Westchester, Hauts-de-Seine, or Charlottenburg, and then work to exclude others from living there, e.g. through restrictive zoning.

What’s more, choosing among 16 German states is reasonable. Even choosing among 50 American states is feasible, since there are differences between various American regions and then people can pick a state within one general area. But choosing among tens of thousands of municipalities is not reasonable. At that level it’s not about exact combinations of issues but about which local government markets itself the best to various classes of people, and about micro-level locations, e.g. on one particular train line. There is no need for such fractional governance.

The democratic deficit

I brought up the issue of the local-level democratic deficit last year. Anti-EU people like complaining about the EU-level democratic deficit, but it’s easier to get informed about EU-level issues in advance of a European Parliament election and choose the right political party for one’s views than to do the same at the local level. I lived in New York through a City Council election and was Facebook friends with a lot of American voters interested in politics and had no idea who was in favor of what, and this has not changed since. Between New York’s extent of primary voter suppression and the total lack of ideological politics, there is no democratic legitimacy in the city’s local elections, and at this point I’m ready to even include the mayor and not just the council.

In Europe, things are not any better than in New York, even though voter turnout is much higher so in principle there should be more democratic legitimacy. I can’t tell you how it even mattered who I voted for in the Stockholm city and county elections, which I was eligible to vote in as an EU citizen. In Berlin I’ve talked to a number of public transportation advocates and I know a lot about Andreas Scheuer and his agenda but about the most I’ve gleaned regarding local elections is the Neukölln bike lane network, except that even there the changes seem subtle by the standards of (say) Anne Hidalgo’s streetscaping, and at any rate people in Neukölln might want to bike to other neighborhoods.

The broad issue here is that local elections are not ideological, but personal. People can pick up an ideology easily and transfer it around. Even modifications for the local situation are not too hard to pick up: people can easily transmit information like “SPD in Berlin is on the moderate side because more left-wing people can vote for Die Linke and the Greens.” I have never lived in San Francisco but could still tell you about the difference between progressives and moderates there and how it differs from same in New York. On the national level it’s even easier, because there’s prestige media covering elections and their issues.

And I suspect that to the people who like localism as it is, the fact that local elections hinge on personality contests is a good thing. If you’ve lived 40 years in one city, you know all the local notables and their petty fights and how you can us them to pass your agenda. You’re empowered. It’s people who have recently moved in who are in practice disenfranchised, but for them you have slurs: “rootless cosmopolitan,” “transplant,” “globalist,” and so on. This democratic deficit persists because powerful people enjoy their power.

This means that the destruction of local government is specifically not just about good government but also about disempowering various local notables, including ones who have sob stories of how much they matter to their communities. They are in favor of bad government, and need to no longer have any power beyond the ability to vote for a party list once in four years.

School Transit-Oriented Development

Transit-oriented development, or TOD, means building more stuff in places with good access to public transportation, typically the immediate vicinity of a train station. This way people have more convenient access to transit and are encouraged to take it because they live or work near the train, or ideally both. In practice, American implementations heavily focus on residential TOD, and secondarily on commercial TOD, the latter focusing more on office than retail. I covered some retail issues here; in this post, I’m going to look at a completely different form of TOD, namely public-sector institutions that government at various levels can choose the location of by fiat. These includes schools, government offices, and cultural institutions like museums. Of these, the most important are schools, since a huge share of the population consists of schoolchildren, who need convenient transportation to class.

This principle here is that the state or the city can site public schools where it wants, whether it’s by diktat or by inducements through funding for school construction. This occurs even in situations with a great deal of autonomy: American suburban schools are autocephalous, but still receive state funding for school construction, and if anything that incentivizes moving to new suburban campuses inaccessible by public transit. Other cultural institutes are usually less autonomous and more strapped for cash, and getting them to move to where it’s easier for people to access them without a car should be easier.

School siting: central cities

Urban schools tend to spread all over the city. There are more schools in denser and younger neighborhoods; there also are more high-end schools (Gymnasiums, etc.) in richer neighborhoods. But overall, there isn’t much clustering. For example, here is what I get when Googling both Gymnasiums in Berlin:

There are many Gymnasiums in rich areas like Wilmersdorf and few in poor areas (the map shows one in Neukölln and none in Gesundbrunnen and Wedding, although a few that aren’t shown at this zoom level do exist). But overall, the school locations are not especially rail-oriented. They’re strewn all over the middle-class parts of the city, even though most students do not live close enough to walk. Only the most specialized of the elite schools is in city center, the French school.

The situation in New York is similar to that of Berlin – the schools in the city are all over. This is despite the fact that there’s extensive school choice at the high school level, so that students typically take the subway and bus network over long distances. New York’s school stratification is not the same as Berlin’s – its Specialized High Schools serve the top 3% of city population, Germany’s Gymnasiums serve maybe 30% – but there, too, schools that explicitly aim to draw from all over the city are located all over the city. Only the most elite of New York’s schools, Stuyvesant, is in the central business district, namely in Lower Manhattan; the second and third most elite, Bronx Science and Brooklyn Tech, are just outside Downtown Brooklyn and in the North Bronx, respectively. A huge fraction of Bronx Science’s student population commutes from feeder neighborhoods like Flushing, Sunset Park, Chinatown, Jackson Heights, and the Upper West Side, and has to wake up early in the morning for an hour-long commute.

If schools are not just for very local neighborhood children, then they should not be isotropic, or even middle-class-isotropic as in Berlin. They should be in areas that are easily accessible by the city’s rapid transit network, on the theory that the time of children, too, is valuable, and replacing an hour-long commute with a half-hour one has noticeable benefits to child welfare and educational outcomes.

Urban school nodes

So to improve transit access to school in transit cities, it’s useful to get schools to move to be closer to key nodes on the rail network. City center may be too expensive – the highest and best use of land around Times Square or Pariser Platz is not a school. But there are other useful nodes.

The first class of good locations is central and near-center areas that don’t have huge business demand. In New York, Lower Manhattan and Downtown Brooklyn both qualify – business prefers Midtown. In Berlin, there are a lot of areas in Mitte that don’t have the development intensity of Potsdamer Platz, and to some extent the French school picked such an area, on the margin of Mitte.

The second is key connection points on the rail network that are not in the center. Berlin is rich in such connections thanks to the Ring. To some extent there are a bunch of schools close to Ringbahn stations, but this isn’t perfect, and for example the Europasportspark shown on the map is between two Ringbahn stations, at one of the few arterial roads through the Ring that doesn’t have an S-Bahn station. In New York, there is no ring, so connections are more sporadic; desirable nodes may include Queensborough Plaza, Metropolitan/Lorimer in Williamsburg, and East New York.

East New York supplies an example of the third class: an area that is rich in transit connections but is commercially undesirable because the population is poor. (The Berlin equivalent is Gesundbrunnen – non-German readers would be astounded by the bile Germans I know, even leftists who vote for anti-racist politicians, heap on U8 and on Gesundbrunnen and Neukölln.) Since everyone goes to school, even working-class children, it is valuable to site schools and other cultural amenities in such areas for easy accessibility.

One important caveat is that freeways, which make office and retail more attractive, have the opposite effect on schools. Air pollution makes learning more difficult, and children do not own cars and thus do not benefit from the convenience offered by the car. If rail lines are near freeways, then schools should be set somewhat away, on the principle that the extra 5-minute walk is worth the gain in health from not sitting hours in a polluted environment.

The suburbs

Outside the cities, the place for schools is the same as that for local retail and offices: the town center, with a regional rail station offering frequent access by train and timed connections by bus. Even when the student population is local, as it is in American suburbs, the density is too low for people to walk, forcing some kind of mechanized transportation. For this, the school bus is a poor option – it is capital-intensive, requiring what is in effect a second bus system, one that is as useless for non-students as the regular buses are for students if the school is far away from the local transit network.

Instead, a central school location means that the suburban bus network, oriented around city center, is useful for students. It increases transportation efficiency rather than decreasing it – there is no duplication of service, and the school peaks don’t usually coincide with other travel peaks, like the office worker peak and the retail worker peak. The bus network, designed around a 15- or 30-minute clockface schedule, also means that students can stay in longer, if they have on-campus club activity or if they have things to do in the town center, such as going shopping.

In some distant suburbs the school peak, arriving around 8 in the morning, may be the same as the peak for office workers who take the bus to the train to go to the central city. This isn’t necessarily a bad thing – for parents who insist on driving, this makes it easier to drop off children on the way to work. If this turns out to create real congestion on the bus, then the solution is to move school start time later, to 9 or so.

It’s crucial to use state power to effect this change when possible. For example, Massachusetts funds school construction through state funds but not renovation, which has encouraged schools to move to new campuses, generally in harder-to-reach areas. Fitchburg’s high school used to be in city center but recently moved to a suburban location close to nothing. Even in environments with a lot of local autonomy, the state should fund school construction in more central areas.

More on the Deutschlandtakt

The Deutschlandtakt plans are out now. They cover investment through 2040, but even beforehand, there’s a plan for something like a national integrated timetable by 2030, with trains connecting the major cities every 30 minutes rather than hourly. But there are still oddities that are worth discussing, especially in the context of what Germans think trains are capable of and what is achieved elsewhere.

The key is the new investment plans. The longer-term plans aren’t too different from what I’ve called for. But somehow the speeds are lower. Specifically, Hamburg-Hanover is planned to be a combination of legacy rail (“ABS”) and newly-built high-speed rail (“NBS”), dubbed the Alpha-E project, with trains connecting the two cities in 63 minutes.

The point of an integrated takt timetable is that trains should connect major nodes (“knots”) in just less than an integer number of half-hours for hourly service, or quarter-hours for half-hourly service. Trains connect Zurich and Basel in 53 minutes and each of these two cities with Bern in 56 minutes, so that passengers can change trains on the hour and have short connections to onward destinations like Biel, St. Gallen, and Lausanne. To that effect, Switzerland spent a lot of money on tunnels toward Bern, to cut the trip time from somewhat more than an hour to just less than an hour. So the benefits of cutting trip times from 63 minutes to just less than an hour are considerable.

What’s more, it is not hard to do Hamburg-Hanover in less than an hour. Right now the railway is 181 km long, but the planned Alpha-E route is shorter – an alignment via the A 7 Autobahn would be around 145 km long. The Tokaido Shinkansen’s Hikari and Nozomi trains run nonstop between Nagoya and Kyoto, a distance of 134 km, in 34 minutes. Kodama trains make two additional stops, with long dwell times as there are timed overtakes there, and take 51 minutes. Shinkansen trains have better performance characteristics than ICE trains, but the difference in the 270-300 km/h range is around 25 seconds per stop, and the Tokaido Shinkansen is limited to 270 km/h whereas an Alpha-E NBS would do 300. So doing Hamburg-Hanover in less than 40 minutes is eminently possible.

Of course, major cities have slow approaches sometime… but Hamburg is not a bigger city than Kyoto or Nagoya. It’s about comparable in size to Kyoto, both city proper and metro area, and much smaller than Nagoya. Hanover is a lot smaller, comparable to cities served by Hikari but not Nozomi, like Shizuoka and Hamamatsu. Hamburg-Hanover has 12 km between Hamburg and Harburg where trains would be restricted to 140 km/h, and around 6 in Hanover where trains would be restricted to 130 km/h; in between they’d go full speed, which at the performance characteristics of the next-generation Velaro would be a little more than 35 minutes without schedule padding and maybe 38 minutes with. This fits well into a 45-minute slot in the takt, permitting both Hanover and Hamburg to act as knots.

Moreover, if for some reason a full NBS is not desirable – for example, if NIMBY lawsuits keep delaying the project – then it’s possible to built a partial NBS to fit into an hourly time slot, trains taking around 53 minutes. The cost per minute saved in this context is fairly consistent, as this is a flat area and the legacy line is of similar quality throughout the route; if for some reason the cost per minute saved is too high, e.g. if nuisance lawsuits raise construction costs above what they should be on such a route, which is around 15-20 million euros per kilometer, then going down only to 53 minutes is fine as it makes the hourly takt work well.

And yet, it’s not done. The biggest cities are not planned to have regular half-hourly knots, because there’s too much traffic there. But Hanover is in fact a perfect place for a knot, with trains going east to Berlin, west to the Rhine-Ruhr, north to Hamburg, and south to Frankfurt and the cities of Bavaria. Hamburg is at the northern margin of the country, with trains going mostly south to Hanover, but having some timed connection with trains continuing north to Kiel and eventually Copenhagen is not a bad idea.

For some reason, German rail activists, including presumably the ones who pushed the Deutschlandtakt from the bottom up while the ministry of transport was run by pro-car conservatives, are just too conservative about the capabilities of trains. I’ve seen one of the D-Takt groups, I forget which one, criticize plans to build an NBS between Hanover and Bielefeld, a segment on which the existing line is fairly slow, on the grounds that it could never fit into a knot system. It is not possible to do the roughly 100 km between Hanover and Bielefeld (actually closer to 95 km) in less than half an hour to fit a knot, they say – average speeds higher than 200 km/h are only found on very long nonstop stretches of high-speed rail, as in France, they insist. Shinkansen trains achieve such speeds over such segments every day, and even with the slightly lower performance characteristics of the next-generation Velaro, Hanover-Bielefeld in 24 technical minutes and 26 minutes with 7% pad (and the Shinkansen only has 4% pad) is feasible.

I genuinely don’t know why there is such conservatism among German rail planners and advocates. It could be that Europeans don’t like learning from Asia, just as Americans don’t like learning from Europe. There are examples of faster trains than in Germany within Europe, but maybe German advocates discount French and Spanish examples because of genuine problems with French and Spanish rail operations, leading them to also make excuses like “the trains run nonstop for 500 km and that’s why they’re fast” to avoid adopting the things where France and Spain are genuinely superior to Germany.

Nothing about the integrated timed transfer schedule idea impedes high speeds. On the contrary, in some cases, like Hanover-Hamburg but also the planned Frankfurt-Stuttgart line (already in place south of Mannheim), high speeds are necessary to make the desired knots. Moreover, where distances between cities are long compared with desired frequency, as on Berlin-Hanover, it’s possible to build 300 km/h lines and cut entire half hours or even full hours from trip times. Germany could innovate in this and build such a network for an amount of money well within the limits of the corona recovery package, which includes €50 billion for climate mitigation.

But either way, Germany is about to make mistakes of underinvestment because it’s not quite willing to see where the frontier of rail transport technology is. This is not the American amateur hour, it’s not the sort of situation where I can spend a few hours with maps and come up with better timetables myself, but even so, the plans here are far too timid for Germany’s medium- and long-term transportation needs.

The D-Takt is a step forward, don’t get me wrong. None of the investments I’m seeing is bad. But it’s a small, hesitant step forward rather than a firm, bold walk toward direction of intercity rail modernization. A country that expects intercity rail ridership to double, putting Germany’s per capita intercity rail ridership in the vicinity of Japan’s, should have something similar to the Shinkansen network, with a connected network of NBS links between the major cities averaging 200-250 km/h and not 120-160 km/h.

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.

Non-urban travel

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.

Coronavirus and Cities

There’s a meme going around the American discourse saying that the Covid-19 outbreak is proving that dense cities are bad. Most of this is bullshit from politicians, like Andrew Cuomo. But now there’s serious research on the subject, by a team at Marron led by the excellent Solly Angel. Solly’s paper looks at confirmed infection rates in American metropolitan areas as of late March and finds a significant correlation with density, but no significant correlation between deaths and density. In this post, I’m going to look at Germany. Here, big or dense cities are not disproportionately affected by the virus.

Why Germany?

Germany has pretty reliable data on infections because testing is fairly widespread, so far covering 1.6% of the population. Moreover, testing is this high throughout the country, whereas in the US, there are vast differences in testing as well as in other aspects of response by state, e.g. New York has tested 2% of state population, Louisiana 1.9%, Florida 0.8%, California and Texas 0.4%.

I also have granular data on infection rates in Germany, thanks to Zeit. The data I’m using is synchronic rather than diachronic, i.e. I’m looking at current infection rates rather than growth. Growth rates aren’t the same everywhere – in particular, they’re lower in North Rhine-Westphalia, which was the epicenter of the German outbreak weeks ago, than in southern Germany – but they’re low enough that I don’t think the situation will change in short order.

Size and density

Within Germany, there aren’t huge gradients in density between cities. More central neighborhoods have taller buildings than less central ones and higher ratios of building to courtyard, but there are no huge differences in residential built form the way there are between American cities.

For example, look at densities by neighborhood in Berlin, Hamburg, Munich, Frankfurt, Cologne, Stuttgart. There aren’t big differences in the pattern: the densest inner neighborhoods have about 15,000 people per square kilometer, and density falls to 3,000-5,000 in outer neighborhoods. Hamburg has a few areas with no residents, since they include the city’s immense port. Stuttgart’s densest districts are in the 5,000-6,000/km^2 range, but that’s because the districts are not very granular and the dense ring of inner-city neighborhoods just outside the commercial center is not congruent to district boundaries.

The upshot is that the big question about density and the risk of epidemics cannot be answered by comparing German cities to one another, but only to the surrounding rural areas. So the real question should be, are the major German cities more afflicted by the virus than the rest of the country?

Infection rates by city

As of the end of 2020-04-09, Zeit reports 118,215 confirmed coronavirus cases, which is 14.2 per 10,000 people. The six states of former East Germany, counting the entirety of Berlin and not just East Berlin, total only 12,873 cases, or 7.9 per 10,000. The Robert Koch Institute’s definitive numbers are slightly lower, but are also slightly outdated, as states sometimes take 1-2 days to report new cases. Going by Zeit data, we have the following infection rates by major city:

City Population Cases Cases/10,000
Berlin 3,644,826 4,357 12
Hamburg 1,841,179 3,518 19.1
Munich 1,471,508 4,123 28
Hanover* 1,157,624 1,389 12
Cologne 1,085,664 1,947 17.9
Frankfurt 753,056 730 9.7
Stuttgart 634,830 1,056 16.6
Dusseldorf 619,294 737 11.9
Leipzig 587,857 451 7.7
Dortmund 587,010 507 8.6
Essen 583,109 578 9.9
Bremen 569,352 425 7.5
Dresden 554,649 476 8.6
Nuremberg 518,365 733 14.1
Duisburg 498,590 525 10.5

*Zeit reports Hanover data for the entire region; the city itself only has 538,000 people

The sum total of the fifteen largest cities in Germany, with 15.1 million people, is 21,552 cases, which is 14.3 cases per 10,000 people. This is the same as in the rest of the country to within measurement error of total population, let alone to within measurement error of Covid-19 cases.

State patterns

Bavaria and Baden-Württemberg both have high confirmed case counts, averaging 23.6 and 21.7 per 10,000 people respectively. Munich’s rate is somewhat higher than the Bavarian average, but its suburbs are on a par with the city, as are some entirely rural areas all over the state. Oddly, the second and third largest cities in the state, Nuremberg and Augsburg, have lower rates – though both Fürth and the rural areas around Nuremberg and Fürth have very high rates as well.

The pattern around Stuttgart is perhaps similar to that around Nuremberg. The city’s infection rate is not much higher than the national average, but the infection rates in counties and cities around it are: Esslingen (24.8/10,000), Reutlingen (29.3), Tübingen (47.9), Böblingen (28.4), Ludwigsburg (22.9).

NRW’s rate is 13.9/10,000, i.e. essentially the same as the national average. The worst is in areas right on the Belgian border, like Heinsberg. Cologne has a noticeably higher rate, but Dusseldorf has a lower rate, and the cities of the Ruhr area a yet lower one. Don’t let the fact that these cities only have around 600,000 people each fool you – they’re major city centers, with the density and transportation network to boot. Dortmund alone has three independent subway-surface trunks, meeting in a Soviet triangle; total public transportation ridership in Dortmund across all modes is 130 million per year. Essen has two subway-surface trunks, one technically light rail and one technically a streetcar tunnel; total ridership there and in Mülheim, population 170,000, is 140 million per year.

What’s going on in Frankfurt?

There is some correlation between wealth and a high infection rate, since Bavaria and Baden-Württemberg have high rates of confirmed cases and the East German states have low ones. However, Frankfurt’s rate is fairly low as well, as are the rates of surrounding suburbs like Offenbach and Darmstadt. Frankfurt is not as rich as Munich, but like Hamburg and Stuttgart, it is fairly close, all three metro regions surpassing Ile-de-France and roughly matching London per Eurostat’s per capita market income net of rent and interest table.

In particular, it is unlikely that the greater international connections of rich cities like Munich explain why they have higher rates. Frankfurt Airport is the primary international hub in Germany, with many passengers standing in line at the terminal and coughing on other people. It would have been the easiest for imported infections to arise there rather than in the Rhineland, and yet it doesn’t have a major cluster.

Frankfurt also has extensive O&D business travel; Wikipedia puts it third after Berlin and Munich, but Frankfurt’s visitors are most likely disproportionately business travelers rather than tourists. This is important, since February and March are low season for tourism, whereas business travelers are if anything more likely to be going to Frankfurt during low season because during the summer high season they go on vacation in more interesting places.

So, is urban density more vulnerable to infectious diseases?

Probably not. Rural Germany has some areas with Korean levels of confirmed cases per capita, and some where 1% of the population and counting has tested positive. Overall, there isn’t much of an urban-rural difference – the 15 largest cities in Germany collectively have the same rate as the rest of the country, and moreover, where there are notable state-level patterns, they also hold for the states’ big cities. If Munich’s high infection rate is caused by its high rate of U- and S-Bahn usage, then the suburbs should have lower infection rates (they’re more auto-oriented) and the rest of Bavaria should be much lower; in reality, nearly the entirety of Bavaria has high rates.

The highest density in the developed world does not exist in Germany. German neighborhoods top at 15,000/km^2, with individual sections scratching 20,000; Paris tops at 40,000 in the 11th Arrondissement, New York scratches 50,000 on the Upper East Side, and Hong Kong has entire districts in the 50s. So the “density doesn’t matter” null hypothesis, while amply supported on German data, requires some extrapolation for the handful of world cities with the highest density.

Nonetheless, these are not huge caveats. German data is pretty reliable in the density range for which it exists; if cities today had the infection rates they did before modern plumbing, when a noticeable fraction of a city’s population might die in a single epidemic, it would be noticeable today. But there is no mass death, nor are urban hospitals here collapsing under the strain. On both the level of a basic sanity check and that of looking at the data, cities do not appear to be vulnerable to disease.

What does this mean?

There is no need to redesign the world to be less urban or dense in the wake of the coronavirus. Nor is there any need to let go of collective public transportation. The Rhine-Ruhr and Frankfurt are not Tokyo or Hong Kong in their public transportation usage, or even Paris or Berlin, but they have extensive urban and regional connections by train. And yet, the Heinsberg disaster zone and the high infection rate of Cologne have not been exported to the Ruhr, nor is southern Hesse particularly affected by German standards.

The virus has exposed serious issues with cleanliness. But even given Germany’s current levels of urban cleanliness, those issues are not enough to turn Berlin, Frankfurt, Hanover, or the Ruhr cities into hotspots. There is no danger to public health coming from urbanization, density, development, or public transportation. Cities should keep investing in all four in order to reduce the costs of transportation and environmental damage, even if the occasional failed politician blames the virus on density to deflect attention from his own incompetence.


Here’s one potential pan-European high-speed rail map, incorporating existing and likely future high-speed lines in France, Spain, Britain and Italy; the lines I’ve argued Germany should be building; and plausible and semi-plausible extensions into Eastern Europe.

Here’s a small version of the map:

For full-size 56 MB link, click here. Blue lines exist or are under construction, red ones are either under planning or proposed solely by me or by local activists.

The Polish network is fairly optimized, but the rest of Eastern Europe isn’t, relying on long-range international connections that may or may not flop due to a possible international trip penalty. I only took it up to a point, so yes, there’s that link via (North) Macedonia and Kosovo, but I drew the line at some point and did not add a line from Warsaw up the Baltics and under sea to Helsinki; the Baltic capitals just aren’t big enough, and the light at the tunnel, Helsinki, isn’t big enough either.

Note also that some cities gain through-tracks on this map that they don’t currently have, especially Paris. This is to be a four-track system connecting Gare du Nord to Gare de Lyon and Gare de l’Est to Gare Montparnasse; since there’s no chance of building the main station under Les Halles this side of the 1970s, the station would have to be at a somewhat skew location relative to city center, most probably around where Gare du Nord and Gare de l’Est are now. Additional cities with notable through-tracks: Milan, Rome, Munich, Florence; Madrid gets through-tracks but those are already under construction as part of the third Cercanías axis, at typically low Spanish costs, and Marseille gets through-tracks as is the plan for the mixed classical/LGV system for Provence.

The trip times are always net of station dwell times and short timed connections at major junctions, so they can be added across the map. In Germany I sat down and figured out frequencies, running consistent stopping patterns every half hour; this doesn’t work Europe-wide, as some places are too low-density and have to make do with hourly patterns, like Eastern Europe (and, if it keeps its baroque fare system, Spain).

Freight Rapid Transit

Is it possible to use a rapid transit-style system to carry light freight, such as parcels? So far no such system exists, and very few semi-relates systems exist (like pneumatic tubes for mail). But it remains an interesting potential technology, provided it is done right. Unfortunately, it is very easy to do it wrong through misunderstanding how freight or how rapid transit works. Therefore, advances in policy in this direction are good but should be done carefully.

Instead of giving people one big takeaway, I’m going to suggest a few good principles for this, motivated by both good and bad proposals.

1. Keep the tracks clear for maintenance at night

Germany’s minister of transport, CSU’s Andreas Scheuer, proposed running freight on the U-Bahn after hours. This is a terrible idea: regular nighttime closures are crucial for maintenance, and without them, maintenance costs go up and daytime reliability tanks. New York’s constant weekend service changes are the result of not shutting down overnight for maintenance nor being able to reliably single-track at nighttime headways. Berlin already runs overnight on weekends and does some daytime maintenance – “Ersatzverkehr mit Bussen” is one of the first ordinary German phrases I learned after moving here. Further encroachment on maintenance windows is not acceptable.

2. Use existing station infrastructure

The main cost in digging urban rail tunnels is the stations – boring tunnels between stations is a solved problem. This means that the main difficulty of urban rail freight is where freight gets on and off the trains. Loading and unloading container-size freight is impossible without massive station digs, all in expensive places. Having a freight car wait on a siding is not possible either – that interface between the customer and the freight railway relies on cheap land and time-insensitive shipping.

Most likely, shipping parcels by rapid transit requires using the existing stations and platforms. There is almost certainly no room at rush hour, when trains are sized to take up the entire platform interface to increase capacity. But in the daytime off-peak, there may be some room for using a portion of a subway station for parcels.

3. Keep up with passenger rail traffic

If freight trains can’t run at night, they have to slot on the same timetable as passenger trains. This isn’t a problem on the tracks – just add an EMU car loaded with parcels rather than passengers. But keeping dwell times under control is critical. Alert reader Mordy K. wrote about this, suggesting a “dynamic Rubik’s cube” that “shifts the packages around in 3D.” This is the real challenge: figure out how parcels get from the train to a designated spot on the platform or from the platform to a designated spot on the train during a 30-second dwell time.

4. Be aware of all interfaces between different systems

There are, at a minimum, five legs to a parcel trip in a city using rapid transit: origin to station, station to train, trip on train, train to station, station to destination. The boarding and alighting steps, so easy for the able-bodied passenger and even for the disabled passenger given rudimentary investment into accessibility, are difficult for a parcel of freight. Tossing a package from a train to the platform is not enough: the package needs to get to the surface for the final leg of the trip. A courier could carry it, but at a high cost – the courier’s modes of transportation for the surface legs, like the e-bike, are bad at getting down to the subway and back up, so the time and physical effort costs are high.

This in turn means that the rail transit freight system needs to be able to put parcels in a freight elevator. Elevators are not free, although they are rarely as expensive as in New York. The problem is that parcels can’t walk across the platform, so the elevator has to face the exact same place every time, which may run into construction difficulties.

5. Don’t wreck passenger rail service

Berlin runs some trains short, especially after hours. Usually the first train after the beginning of short train service is very crowded, because passenger service demand is still too high for a half-train at the typical density of daytime Berlin trains. (I say typical density because I have never seen a Berlin train as crowded as the busiest off-peak trains in Paris or New York, let alone their busiest peak trains.)

What this means is that in practice there isn’t that much space on the train for freight. Running trains every 5 minutes until later at night but then cordoning off half for freight may be feasible – right now headways rise to 10 minutes around 9 in the evening – but it’s still just a few evening and early night hours for delivery.

This principle is equally important at the stations: cordoning off parts of the platform for freight is fine, but only if it does not interfere with passenger capacity or circulation. This may further constrain where freight elevators go: whatever automated system gets parcels from the train to the elevator will have to cross passenger traffic at-grade, and driverless technology can do it but not cheaply or smoothly.

6. Aim to work with a wide range of goods

Pneumatic tube systems for mail work for mail, but modifying them for other goods isn’t trivial. In contrast, a parcel delivery system should aim to be broadly usable by many goods with a high ratio of value added to weight. Subtle differences are important at this level of detail: glass and china goods can’t be thrown on the floor, fresh food spoils if it’s left outside for too long, jewelry and electronics face a high risk of theft. The technology has to have adequate tracking, punctuality, defense from shocks, and so on.

7. Be aware of the competition

Delivery by rapid transit is not the only alternative to trucks for cross-city shipping. Delivery by drone is in active development, both surface drones and flying drones. Surface drones have good synergy with trains, since surface drones are slow and make better first- and last-mile connections. But flying drones are in direct competition, since they work well at a range of a few kilometers rather than a few hundreds of meters. Flying drones so far only work at extremely high value-to-weight ratios, but if they become more widespread, it’s useful to think of how urban rail can compete.

Germany and Nuclear Power

I’ve seen far too many people in the English-speaking world attack Germany repeatedly for its closure of nuclear power plants, for a variety of reasons. So as a public service, I would like to explain why Germany is like this. This may be relevant to other related issues concerning the politics of the green transition, including transportation and urbanism.

Electricity in Germany

There’s easy-to-search data on the electricity mix in Germany by source on Clean Energy Wire and the Working Group on Energy Balance (AGEB); on the latter site, Stromdaten gives the overall mix. In 2019, 40% of German power generation was renewable, and 12% was nuclear. The renewable share of German power consumption was slightly higher, 42.6% – Germany is a net exporter of electricity. The biggest contributor to renewable power is wind, but solar has recently been growing as well. Hydro power counts with renewable energy here, but is not a major factor, as German population density is high, unlike in Canada, Sweden, or Norway.

Over the decade, there was a large reduction in nuclear power generation. Nuclear power generation is down by slightly less than half, and a full phaseout is expected by the end of 2022. This has created a lot of criticism from pro-nuclear advocates as well as from trolls who enjoy attacking Germany, the green movement, and German greens specifically. Here is one typical example, a 2013 Telegraph article warning German economic growth might fall and saying utilities were turning to coal. But coal production fell in absolute numbers even more than nuclear power, down over the decade from 42% to 28%.

Why is Germany like this?

It’s still worth asking, why did Germany cut nuclear production, where it could have instead reduced coal production even further?

The answer can be found in the following Cold War joke:

Q. What is a tactical nuclear weapon?
A. Anything that lands on Germany.

West Germany built some nuclear plants in the 1960s and 70s, as did many other developed countries, like the US and France. But it faced New Left protests early and often, and this has to be understood in the context of the association between nuclear power and nuclear weapons. In Japan, such popular opposition happened even earlier, going back to the 1950s; the state kept building nuclear plants anyway, but slowly, without anything like France’s rapid buildup in the aftermath of the 1973 oil crisis.

Nuclear power advocates get frustrated when people compare nuclear power with nuclear weapons, but peaceful use of nuclear power always involved this association, often by supporters too. In the US, physicists proposed using nuclear bombs for infrastructure purposes. In the 1960s there were plans to use nuclear bombs to built I-40 as well as straighten the Southern Transcon; eventually I-40 was built by conventional means, and the Southern Transcon was not straightened. This was always a solution looking for a problem – the atomic age was the hallmark of modernity, so why not use nukes for more purposes than just war?

In France, too, the reasoning for the buildup of nuclear energy in the 1980s was justified on national security grounds – “in France we have no oil, we have ideas.” Germany and Japan, which do not have the global superpower pretensions of France, did not have the same justification to expand nuclear power at the same time.

Nuclear power and the modern greens: costs

On the eve of the Fukushima plant closures of 2011, German electricity was 23% nuclear, French electricity more than 70%. The origin of this difference is not about modern greens but about whether the national consensus viewed nuclear weapons positively or negatively in the 1970s and 80s, at which time nobody thought climate change was a serious problem.

The 2010s and 20s are not the 1970s and 80s; today, people do understand just how important climate change is as a global environmental problem. The green movement has adapted, if not as radically as pro-nuclear advocates would like. The German environmentalists I talk to either don’t care about nuclear power or are in favor of keeping it around. I tried to explain to the Breakthrough Institute’s Ted Nordhaus that at the big Fridays for Future protest on the 20th of September, there were hundreds of anti-coal power sign and just one anti-nuclear sign, held by people visibly older than most of the millennial and postmillennial attendees; he replied, “Greta is anti-nuclear.”

What is true is that nobody except Breakthrough calls for the construction of new nuclear power. But nuclear power is expensive with modern safety standards, while the costs of renewable energy are falling, those of onshore wind in Germany already lower than those of any other source, even coal. A 2009-11 analysis claims onshore wind costs $1.75-2.40 per watt to install (source, PDF-p. 25). A 2018 comparison within Europe finds a range of 1-1.50/W for onshore wind and perhaps 1.50-2.50 for offshore wind (source, PDF-p. 24), with noticeable correlation between a country’s wind power costs per watt and its urban subway tunneling costs per kilometer. Breakthrough has a cost comparison of nuclear power plant construction, where South Korea, which they praise for its low-cost construction, builds plants for about $2.50/W after PPP adjustment.

The cost comparison suggests strongly that people interested in green energy should be fine with retaining existing nuclear power in the medium term but not call for new capacity – it’s more expensive than renewables.

Political compromises

There are people who are against nuclear power categorically. There are people who want to reduce greenhouse gas emissions. There is a clash between these two propositions, but it is not a total war. Before Fukushima, German power was 23% nuclear, and nuclear power costs were already higher than wind power costs, so decarbonizing the German electricity sector meant incentivizing more renewable power, not building more nuclear power. Since there was no point in dying on the nuclear hill – it was too small a share of power generation to be worth defending as in France, and too expensive to be worth expanding – the NIMBYs got their wish and nuclear power is being phased out early. Nonetheless, the majority of German electricity is generated by carbon-free sources, and the growth in renewable power has grown its scale to make it economic.

In France, the calculation is different. After Fukushima, there was no chance of a phaseout, only plans to reduce the share of electricity coming from nuclear power from the 70s to 50%. But the Macron administration has extended the lifespan of existing plants and pushed back plans for plant closure. In France, the nuclear power share is high enough because of decisions made in the 1970s and 80s that defending what exists is important, and thus the state can postpone mass installation of solar and wind energy until costs fall further. But in Germany, with an imminent need to install renewable power anyway, the political compromise went in another direction.

The formation of a de facto anti-nuclear political consensus has to be seen in this context. By the time the political system got serious about reducing greenhouse gas emissions, roughly in the 2000s and 10s, the costs of renewables were more favorable than those of nuclear power. Thus, to people who do distinguish nuclear power from nuclear weapons, think the plants are safe, and harbor no NIMBY opposition to new construction, nuclear power was an acceptable political sacrifice. It wouldn’t be the first choice to close these plants, but as a second choice combined with extensive renewable construction, it was fine.

It’s important to think in terms of goals – decarbonization, improving public health, reducing housing costs, etc. Breaking down these goals further – decarbonizing the power sector, reducing air pollution, etc. – can be desirable for specific solutions. But the goals are still too important for activists to be wedded to a specific solution and convert it from a means to an end. If the relative costs of different solutions change, it’s important to recognize this fact and switch support to the cheaper solution.

Off-Peak Public Transport Usage

Earlier this year, I slowly stumbled across something that I don’t think is well-known in comparative public transportation: European cities have much higher public transport ridership than someone experienced with American patterns would guess from their modal splits. From another direction, Europe has much lower mode share than one would guess from ridership. The key here is that the mode share I’m comparing is for work trips, and overall ridership includes all trip purposes. This strongly suggests that non-work public transportation usage is much higher in European than in American cities even when the usage level for work trips is comparable. Moreover, the reason ought to be better off-peak service in Europe, rather than other factors like land use or culture, since the comparison holds for New York and not only for truly auto-oriented American cities.

Modal shares and ridership levels

My previous post brings up statistics for work trip mode share in England and France. For the purposes of this post, I am going to ignore England and focus on France and wherever I can find data out of Germany and Austria; the reason is that in the secondary cities of England, public transport is dominated by buses, which are hard to find any ridership data for, let alone data that doesn’t have severe double-counting artifacts for transfer passengers. For the same reason, I am not going to look at Canada – too many transfer artifacts.

In contrast, French and German-speaking metro areas with rail-dominated public transport make it relatively convenient to count rail trips per capita, as do the more rail-oriented American metro areas, namely Boston, New York, and Washington. A secondary check involving both bus and rail can be obtained from The Transport Politic, comparing the US with France.

City Population Definition Trips/year Trips/person Mode share
Boston 4,900,000 Subway, commuter rail 204,000,000 42 12%
New York 20,000,000 Subway, PATH, LIRR, MN, NJT Rail 2,050,000,000 103 31%
Washington 6,200,000 Metro, MARC (daily*280), VRE (daily*250) 245,000,000 40 12%
Vienna 3,700,000 U-Bahn, trams, S-Bahn (PDF-p. 44) 822,000,000 222 40%
Berlin 5,000,000 U-Bahn, trams, S-Bahn 1,238,000,000 248 35%
Hamburg 3,100,000 U-Bahn, S-Bahn 531,000,000 171 26%
Stuttgart 2,400,000 Stadtbahn, S-Bahn, Regionalbahn 223,000,000 93 26%
Lyon 2,300,000 Métro, trams, funiculars, 0.5*TER 325,000,000 141 20%
Marseille 1,800,000 Métro, trams (daily*280), 0.5*TER 139,000,000 77 16%
Toulouse 1,300,000 Métro, trams 125,700,000 97 13%
Bordeaux 1,200,000 Light rail 105,500,000 88 13%
Lille 1,200,000 Métro, trams 108,500,000 90 17%


Note that New York, with a 31% mode share, has not much more rail ridership per capita than French metro areas with mode shares in the teens, and is a quarter below Lyon, whose mode share is only 20%. This is not an artifact of transfers: just as the subway dominates ridership in New York, so does the metro dominate Lyon, Toulouse, and Lille, and so does the tram dominate Bordeaux. If anything, it’s Stuttgart, the only European city on this list with comparable ridership per unit of mode share to the US, that should have the most overcounting due to transfers.

Also note that French rail ridership nosedives in the summer, when people go on their 5-week vacations, and I presume that this equally happens in Germany and Austria. The ratio of annual to weekday ridership in France where it is available is fairly low, not because weekend ridership is weak, but because the weekday chosen to represent daily ridership is never in the summer vacation season.


Off-peak public transportation in the United States is quite bad. In New York, 10-minute frequency on most lettered routes is the norm. In Washington, the off-peak frequency is 12 minutes. In Boston, it varies by line; on the Red Line each branch is supposed to come every 12-13 minutes off-peak, but in practice trains don’t run reliably and often leave the terminal bunched, alternating between 3- and 10-minute gaps.

Moreover, commuter trains are so useless except for peak-hour commutes to city center that they might as well not exist. Hourly gaps and even worse are routine, and even the busiest New York commuter lines have at best half-hourly off-peak frequency. These lines are only about 15% of rail ridership in New York and Boston and 6% of rail ridership in Washington, but they contribute a decent volume of commuters who drive for all non-work purposes.

In Berlin, the off-peak frequency on the U-Bahn is a train every 5 minutes most of the day on weekdays. On Sundays it drops to a train every 8 minutes, and in the evening it drops to a train every 10 minutes far too early, leading to overcrowding on the first train after the cut in frequency around 9 pm. The S-Bahn trunks run frequently all day, but the branches in the suburbs only get 10-minute frequency, and the Ring has a 2-hour midday period with 10-minute gaps. The suburban areas with only S-Bahn service get comparable service to neighborhoods on New York subway branches, while closer-in areas get better service. No wonder people use it for more than just work – the train is useful for shopping and socializing at all hours of the day.


The people who manage public transportation in the United States do not have the same profile as most riders. They work traditional hours, that is 9 to 5 on weekdays only, at an office located in city center. Many senior managers do not use their own system. That NYCT President Andy Byford does not own a car or know how to drive and takes the subway and buses to events is unusual for such a senior person, and early media reports noted that some managers looked askance at his not driving.

Growing segments of the American middle class commute by public transportation. In Boston and Washington, transit commuters slightly outearn solo drivers, and in New York they do not but it is close. But those segments have different travel behavior from public-sector planners. For example, lawyers work long hours and depend on the subway at 8 or 9 pm, and programmers work shifted hours and both show up to and leave work hours after the traditional times. But public transportation agencies still work 9 to 5, and thus the middle-class transit-using behavior they are most familiar with is that of the denizen of the segregated suburb, who drives to all destinations but city center.

In such an environment, off-peak service is treated as a luxury. When there is a deficit, agencies cut there first, leading to frequency-ridership spirals in which lower frequency deters riders, justifying further cuts in service until little is left. In New York, there are guidelines for frequency that explicitly state it is to be adjusted based on ridership at the most crowded point of the route, without regard for whether cuts depress ridership further. There is a minimum acceptable frequency in New York, but it is set at 10 minutes on weekdays and 12 on weekends. For a similar reason, the planners tend to split buses between local and limited routes if each can support 10-12 minute headways, at which point the buses are not useful for short trips.

In contrast, in Germany and France, there is a mixture of drivers and public transportation users among managers. German planning stresses consistent schedules throughout the day, so the midday off-peak often gets the same frequency as the peak. French planning does vary frequency, but maintains a higher base frequency even late into the night. The Paris Métro runs every 5 to 7 minutes at 11 pm. The idea of running a big city metro line every 12 minutes is unthinkable.