It is much harder to find estimates of construction costs for elevator access to metro stations than to find estimates for the costs of new tunnels. Accessibility isn’t as flashy, so it does not get reported in the international trade press. If you’re a humble blogger who has no idea what the Japanese phrases for “elevator,” “wheelchair accessibility,” and “construction costs” are, you have no way of figuring out how much it cost Tokyo to get its legacy subway network to be about 80-90% accessible. Thankfully, there are enough European cities where I do know those phrases that I do have a list. It comprises just eight cities, two in the US and six in Europe, and in at least one case (Milan) I don’t fully trust the numbers.
New York:the current capital plan spends $740 million on 19 stations, and a single elevator is $10 million if I understand Curbed correctly. The headline figure is $39 million per station.
Boston: MBTA head of systemwide accessibility, Laura Brelsford, told me that Symphony is a $25 million, 4 elevator project, and that Copley and Arlington were in the $30-40 million range each. I can’t find a link, unfortunately.
London: here is a source saying a £76 million fund would make 12 stations step-free, but I don’t know which stations. This source states a higher figure, £200 million for 13 stations, which in PPP terms is about $22 million per station. The lower figure is only $9 million per station.
Paris: nothing is accessible except M14 and the RER and there are no plans to make anything accessible, but a disability rights organization estimates the cost of making all 303 Metro stations accessible at €4-6 billion. Subtracting M14-only stations this is also about $22 million per station at the midpoint.
Madrid: a 2016-20 plan breaks down costs per station. They’re about €5 million per station per line it serves (so a 3-line transfer is €15 million), and a single elevator is €1.5 million. The relevant numbers are on PDF-pp. 12-17. This document used to exist in English too but the URL broke and the Web Archive doesn’t have it. Lumping all remaining stations together, few of which are transfers, gives €531.9 million for 93 stations, or $7.5 million per station.
Berlin: follow the link from my tweetstorm. The U-Bahn is about to complete step-free access by 2020. The cost is €800,000 per elevator, €2 million per station, or $2.6 million per station.
Barcelona: I have three separate sets of numbers, and am placing the city on this list with the lower two. Here is a source describing the installation of elevators at 14 stations for €26.8 million. Here is a source describing a single station on a different line to be made accessible for €2.1 million. In contrast, a document describing the plan for universal accessibility states the cost up to 2009 at €390.97 million euros (PDF-p. 87) for 73 stations (PDF-p. 83). The first two sources average to $2.5 million per station, but the third one, covering more stations, including complex transfer points, averages $7 million per station in what I imagine are in 2009 prices.
Milan: this article seems to be saying that elevator installation at 21 stations is budgeted at €24.5 million, all on Lines 1 and 2, which are shallow cut-and-cover lines built under narrow medieval streets. I’m not sure whether all of these are elevators, though – the Milan Metro site says that it has elevators at some stations and stairlifts at others. This totals $1.5 million per station.
The low construction cost of elevator accessibility in Berlin is notable since the city’s tunneling costs are not so low. I am still trying to talk to local transit officials about this, but my surface understanding is that fewer elevators are needed per station. The city uses island platforms rather than side platforms and has shallow subsurface stations with access from raised street medians, so a single elevator covers the entire station.
That said, Paris and New York both have extensive cut-and-cover construction under very wide streets, much like Berlin. A multiple of 2 over Berlin costs is to be expected as they have side platforms, and thus all station infrastructure needs to be doubled. However, Paris’s costs are (apparently) higher than Berlin’s by a factor of 9 and New York’s by a factor of 15. Paris is not a high-cost city when it comes to tunneling, and it’s possible that the activists just estimated it based on London costs, or that the government made up a high number in order to sandbag the calls for step-free accessibility.