Tom Anderson wrote:

I might have lost the plot, but that seems to make no sense
whatsoever - making the line longer wouldn't have capacity
implications. You could run trains at exactly the same frequency
(if you had a few more), so as far as Brixton is concerned, it
wouldn't be any different. Or am i being stupid?

Extending the line and adding more stations increases the number of
passengers that the line must carry. To ensure that loadings remain
even, train frequency must be increased to compensate, which is the
problem at hand.

All Victoria Line trains that can be used are in use, AFAIK. The only
way to get more trains is to build them - the 2009TS.


However, what i really want to know is ...

A loop at Herne Hill is not the only way to increase capacity
on the Vic - a flying terminus would do the job just as well,
without the pain of turning trains around.

What the hell is a flying terminus? I'm getting visions of some
sort of Hayao Miyazaki sort of affair ...

http://216.55.161.203/theonekea/unde...g-terminus.txt

The person who invented this has done the math and discovered that
reversing capacity on this terminal layout is very high - capacity is
only limited by the run in time + dwell time + run out time; if these
values are kept low, frequencies as high as 40tph can be contemplated.