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Re:The Subway Doesn't Have to Be Hot and Gross by amarshall on Saturday September 08, 2018 @01:25AM (#17939558)
The biggest problem is indeed cost. Installing platform doors on the platforms throughout the system has been estimated in the past at US$1 million per station (US$400–500 million) in 2012 [1] and US$1 billion in 2013 [2]. But those estimates seem incredibly low now given more recent per-station costs elsewhere (CA$10 million, €2.6 million) [3], and the fact that NYC subway construction is higher than most other major cities [4]. As for depth, most NYC subway stations are directly below the street.

I’d be surprised if NYC builds platform doors before Communications-Based Train Control (CBTC).

[1] https://www.wnyc.org/story/283792-nyc-mta-tepidly-explores-p...

[2] https://www.nytimes.com/2013/01/29/nyregion/mta-says-subway-...

[3] https://www.thetransportpolitic.com/2017/09/26/the-case-of-t...

[4] https://www.nytimes.com/2017/12/28/nyregion/new-york-subway-...

Re:The Subway Doesn't Have to Be Hot and Gross by scarejunba on Saturday September 08, 2018 @02:38AM (#17939760)
But that's probably because NYC pays some multiple of what anyone else would pay.

https://www.nytimes.com/2017/12/28/nyregion/new-york-subway-...

Re:The Subway Doesn't Have to Be Hot and Gross by amarshall on Saturday September 08, 2018 @03:00AM (#17939815)
Yes, and I mentioned that (and the same article) in my post :). But even if you ignore NYC being more expensive, the more recent estimated per-station prices in Paris and Montreal would come to around US$1.5–3 billion for all of NYC’s stations. If NYC remains around 6x the price in Paris, then that’s around US$9 billion for platform doors in NYC.