In message , Richard J.
writes
At Montparnasse-Bienvenuë Métro station actually. It runs at 9 km/h
instead of the usual 3 km/h. Stepping on and off a travelator going at
that speed would be hazardous, so they have a transition area at each
end where there are small rollers turning at a slower speed. It could
be tricky to use the same technique for an escalator. There's a photo
I took earlier this year at
http://images.fotopic.net/?id=40778626&noresize=1
I've been there several times but never found it working. Have I been
unlucky, or has it been taken out of use permanently?

--
Clive Page