"David Wilcox" wrote in message
...
It might be more convenient for passengers if Crossrail were to be
constructed for shorter, double deck, trains. They do seem to be popular
with operators in other countries for commuter services, e.g. Germany,
USA,
Australia.

Shorter trains would mean shorter walks for passengers at stations.

For Crossrail, shorter trains would actually mean *longer* walks for
passengers at (some) stations. The Central area stations are most, if not
all, designed with two exits. For example, Liverpool Street will have one
end, as you'd expect, at Liverpool Street, but the other exit will give
interchange with Moorgate. Regular passengers will soon get used to which
end of the train is best for them.
Peter