I'm not sure any of them would turn off for longer than 2-3 minutes at a time. The minimum frequency would be about 12 tph (5 mins interval) but that's in each

I'm not sure any of them would turn off for longer than 2-3 minutes at a time. The minimum frequency would be about 12 tph (5 mins interval) but that's in each direction. You only need one person alighting from a train to cause the elevator to turn on. The less used suburban stations don't have escalators at all.