In message
-septe
mber.org, at 09:27:36 on Sun, 22 Jan 2017, Recliner
remarked:

If it takes me 2 minutes to walk over that bridge (say), unless I'm
injured I know it will always take that.

It's much more than 2 minutes.

It's about 200m long, and has travelators, so two minutes is about right.

What about the escalators up and down?

OK, so add another minute.

They are extremely long escalators.
--
Roland Perry