Motion Activated Escalator

So coming from DC, where the metro system is plagued with problems keeping its escalators running, I was amazed to find an outdoor, motion activated escalator that worked. I have heard that these exist in the US, and the technology isn't that complicated, but to see it put into action is impressive. In DC we have motion activated escalators-that is to say, you walk up them! One thing that Japan stands out in is the constant strive to make improvements, even if small, and the constant care they take of most everything. Which is why you can have escalators that work and public bathrooms that are clean! And after a night out at the Izakaya, it is always a relief to have a bathroom on hand at the train station, provided you have time as you run to catch the last train of the night at midnight!!