On Jul 31, 5:04 pm, James Farrar wrote:
The greatest advantage of the four-track system [1] is that it allows
24-hour running.

I don't think this is actually as important as it's made out to be.
The system has a lot of two track sections that are also 24 hour, and
even in the four track sections one pair is generally in use 24 hours
a day, with only occasional diversions for engineering. It'd be
interesting to find out what working practices allow this and whether
they could be applied in London.

U

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