perhaps bacontrout
you had not realised that walking up or down escalators is quicker than the stairs. For those in a hurry. Which is why the rule is that people who wish to remain still on the escalator stand to one side, so that those wishing to have a bit of speed can proceed past.

Also some stations have stairs as emergency use only.
(darras jeg har en grevling i hodet. Grevling, grevlang, Sat 3 May 2008, 22:17, Reply)