In message , at 10:51:30 on Thu,
5 Mar 2009, Ian Jelf remarked:
The new escalators slow down when no-one's using them... I've seen
that in Stockholm, but is this the first one in Britain?

In Hamburg they stop altogether...

So how do you know which is which?

If it's like Brussels or Cologne, there's a blue circular "Ahead Only"
traffic-type sign on one escalator and a red circular "No Entry" sign
on the other.

Many countries have escalators that work "on demand" and usage is on a
combination of signage and context. It's common to have an "up"
escalator but only "down" stairs, or there's an obvious tidal flow that
the escalator is servicing (eg 'towards' baggage claim at an airport).
--
Roland Perry