|
|
|
|
|
|
by Symbiote
2930 days ago
|
|
|
> The Underground trains are narrow-gauge light-rail. No, they're standard gauge heavy rail; in some places the track is shared with ordinary passenger trains. The older tunnels just have very tight clearance. You may mean the structure gauge, which is the clearance for tunnels, platforms and so on. That is normal-rail for Crossrail. |
|
|