Re:How Politics and Bad Decisions Starved New York’s Subways
by Symbiote on Monday November 20, 2017 @06:27AM
(#15739199)
> it's not like they could tear out New York city and build fresh then put it all back
Several large cities in Europe have built new high speed tracks in tunnels under the city.
The track between London St Pancras and Stratford stations in London (and from Stratford further east) is an example. St Pancras is the end of the line, so the speed is necessarily limited by the acceleration and braking capability of the train, but [1] says the speed is 230km/h = 142mph. [2] says speeds in tunnels are limited to 270km/h (168mph), they probably mean a bit further out of the city.
Other than the last 1km or so, the whole track of this route is new.
Realistically, any city worth spending so much money on will have every train stopping at it, so there's no need for higher speeds in under-city tunnels.
Several large cities in Europe have built new high speed tracks in tunnels under the city.
The track between London St Pancras and Stratford stations in London (and from Stratford further east) is an example. St Pancras is the end of the line, so the speed is necessarily limited by the acceleration and braking capability of the train, but [1] says the speed is 230km/h = 142mph. [2] says speeds in tunnels are limited to 270km/h (168mph), they probably mean a bit further out of the city.
Other than the last 1km or so, the whole track of this route is new.
Realistically, any city worth spending so much money on will have every train stopping at it, so there's no need for higher speeds in under-city tunnels.
[1] https://www.railforums.co.uk/threads/hs1-maximum-permitted-s...
[2] http://news.bbc.co.uk/2/hi/in_depth/629/629/6969116.stm