"Tom Anderson" wrote in message
rth.li...

There's a rather nice diagram of Kennington on my site at
http://www.geocities.com/Athens/Acro.../stations.html
In particular, Charing Cross reversers don't have to share track with
any
City trains, whereas City reversers have to share track first with
Charing
Cross-Mordens and then with Morden - Charing Crosses. LUL are well
aware
that the West End is much busier than the City outside the peaks, but
for
fit people a cross-platform interchange is practically as good as a
through
train.

I can understand why thery run most trains to Bank in the peaks -
because of the track layout, plus the lesser fact that the Bank/CX
demand ratio his higher in the peaks than off-peak.

What i don't get is why the off-peak pattern runs all through trains
to Bank, reversing *everything* from CX. There, the density of trains
is much lower, so the track issue is surely irrelevant - even with the
awkward layout, you could surely run all trains to CX, and have space
to reverse Banks? Since in the off-peak the Bank/CX demand ratio falls
dramatically, this would serve people much better.

There are still 15tph on each branch off-peak. If all Banks reversed at
Kennington then there would be 30tph on the section between the junction
and the siding. Also trying to reverse a train every 4 minutes in 1
siding would be pretty difficult.

Peter Smyth