Getting pretty far off topic here, but just wanted to mention–as a university maintenance man, I drove a surplus parking enforcement scooter manufactured by Cushman. It was a three-wheeler, too. It had metal skids on either side of the front wheels that often threw sparks as I turned corners. Once I was giving two other guys a ride and we were so unbalanced that we started to tip when I pulled into the parking space. Luckily the guy on the right put his leg out and pushed us back up.
Eventually university police pulled me over and reminded me that it was technically a vehicle and traffic laws applied.
This same model, but the one I drove had curtains on the sides instead of a door:
