In article , Aidan Stanger
writes
Travelators probably do cost more than escalators,

Not in principle - a travalator is simply an escalator with slightly
different treads (since they don't need to slide perpendicular to each
other) and possibly a longer track. Indeed, the original ones at Bank
*were* modified Otis escalators.

The longer track will mean a bit more cost, but a 100m travalator should
cost the same as a 50m vertical drop escalator, since both have the same
track length.

There's a station on the Paris Metro which has hybrids: escalators that
a

\
\
\_________
\
\
\

and

\
\
\_________

shaped.

--
Clive D.W. Feather, writing for himself | Home:
Tel: +44 20 8495 6138 (work) | Web: http://www.davros.org
Fax: +44 870 051 9937 | Work:
Written on my laptop; please observe the Reply-To address