"Clive D. W. Feather" wrote in message
...
In article , Dave Arquati
writes
The current service pattern fails at Camden when a train from either
southern branch destined for a particular northern branch reaches the
junction at the same time as a train from the other southern branch,
destined for the same northern branch - one of the trains must wait and
blocks trains behind it (destined for the other branch).

Not quite: I *think* that the junctions on the Charing Cross branch are
far enough south that a train can stand between the divergence and the
convergence with the Bank branch. Thus if you have one for Edgware on each
route, you let the Bank one in and hold the CX one; a following CX-Barnet
train can then run. Similarly in the southbound direction.

The signal diagrams at
http://www.trainweb.org/tubeprune/Ca...wn-lct5-10.gif appear to
confirm this is possible.

Peter Smyth