In message , at
09:35:09 on Mon, 25 Jun 2007, Tom Anderson
remarked:
It's actually to do with the lengths of the signal overlaps on the
exit from the station. A train departing a closed station at full
speed can crash into another train without being stopped by the
signalling. A train departing the station having stopped, or crawled, can't.

Does this mean that, on the rare occasions when one of its stations is
closed, the DLR does not suffer from this problem?

No, the stopping pattern seems irrevocably burnt in. Even when Heron
Quays was shut for rebuilding, the trains stopped where the station
should have been.
--
Roland Perry