wrote:
On Wed, 14 Dec 2016 07:05:52 +0000
Basil Jet wrote:
https://www.youtube.com/watch?v=dtNCQmWO0-8

I'm amazed it isn't battery or fuel cell or something. The Crossrail
tunnels are not designed to allow fumes to vent!

I would hope there's actually quite a number of ventilation shafts and fans in
the tunnels or its going to get bloody hot in summer!

Yes, there are. Ensuring adequate ventilation was a big part of the design.