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This three-sided pole on an airport tram
(sh.itjust.works)
I had never seen one of these before today. They're great. Way better than reaching for a single pole in a crowded car and wrapping your hand around some stranger's fingers. And If you have the whole thing to yourself you can hook your arm through it.
Bonus: You should be able to put a hook around the bottom to hold your bag/umbrella. Someone measure the diameter of the pole so we can start making 3D printed hooks for this purpose!
Subway rider here. I will always have one arm through my bag handle. People often get stuff stolen on commuter trains in a lot of cities.
People yoink stuff and jump off the train right before the door closes.
Or yourself!
This is how you get hooked on 3D printing ๐