I do not usuallystandon a movingescalatorandgo through it.
I want to passthe maximum number ofsteps. Up or Down!
What is the speed(stepsper second)should I go?
One symbolic and numeric solution I need (from my students too) 
PS
The largestescalatorin the worldis located in Moscow, at the metro station"Victory Park". Its length is126meters andheightof 63.4m.
Escalatorspeed- 45meters per minute
The width of thestepsof the escalator-0.4 m