"Centaur" wrote in message
...

"Michael Bell" wrote in message
...
The time wasted on opening and closing the tube doors
has always irritated me.

Yes I agree time is lost, bear in mind of course that on the Central
the circuitry has to 'make' when the train stops over the PAC
[Platform ATO Communications Transmit/Receive] at platform stopping
marks.

IMHO there's no "of course" about this delay. Isn't it possible to detect
that the train has stopped and that it's in the correct position in a small
fraction of a second? A delay of 2 seconds per station means you need an
extra train on the Central line, so it's not trivial.
--
Richard J.
(to e-mail me, swap uk and yon in address)