On Tue, 31 Jul 2007, Mr Thant wrote:

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.

I would also like to know this.

tom

--
The girlfriend of my friend is my enemy.