> [increasing speeds would save] about 670,000 hours a year.
Are they the bottleneck? How many fewer/additional injuries would result from increasing escalator speeds? (Do people get good thinking done during their climbs and descents?)
Anyway, using the escalator would mean not jogging up/down the stairs as is my instinct.
According to the video from clan, speeding up escalators above about .75m/s results people leaving gaps between each other, so the speed increase is negated by a volume decrease.