Originally Posted by
pablo42
Wouldn't that apply to the Circle Line on the Underground in London, WW.
I thought that. But it is open to the air at various points. Edgware Road station is totally open air and not in a deep cutting - from street level it is a few steps down to the platform. It may be pedantic points and the Circle Line can maybe regarded as the longest. I don't know the length of the Glasgow loop which is 100% underground.
Also, the Tunnel from Central emerges for a few yards at Herculaneum, then back into a another tunnel to near St Michaels Station. This is 1082 yards, approx 3/4 mile. If the Central Line in London is regarded as all one tunnel then 1082 yards can be added to the B'head Park to St Michaels, which gives 4.72 miles - I think.
div>
I don't know why they never insisted this small open section of track at Herculaneum was not covered to create one tunnel as this section of line is a noise nuisance to the now many residents around the area. It can't be expensive to close the track in using concrete arches.
Bookmarks