Reply To: May one use an escalator on shabbos?

DY, Rav Neuwirth hedges on the use of Shabbos elevators. In my edition (English, copyright 1989) there’s a footnote saying, “Due to the complicated technicalities involved and the differences of opinion among the authorities, one would be well advised not to use an elevator on Shabbath or Yom Tov without consulting a properly qualified rabbi.” He mattirs escalators with this only this proviso: “One may not use them if they are put into motion by one’s approach.”