On Jul 24, 11:21 pm, D7666 wrote:
On Jul 24, 11:44 am, Boltar wrote:

How different are these standards to those required for the rail
tunnels in the alps?

Has been discussed ad nauseam in uk.railway over the last 10 years.

Well excuse me for not trawling back through a few hundred thousand
posts from the 90s.

B2003