In article , Phil Richards
writes
Fine except the possessions would be weeks long not just a long weekend
as you've stated. About 2 or 3 summers ago the Victoria Line was closed
between Victoria & Brixton for about 3 weeks. We're talking here of about
500 *continuous* hours to replace at the most a couple of miles of track
and a few sets of points. Does it really take that long?

That depends whether it was just simple track replacement, or if there
was other stuff as well.

But, if it *does* take 500 hours, which is better:
- 3 weeks continuous closure
- 7 months with significantly increased numbers of problems because of
temporary works
?

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