veering off-topic, that's one of the problems I have with electric bikes - they stop being bicycles and become another kind of vehicle - a faster vehicle that needs longer stopping distances and now has a highe r fatality rate when colliding with a pedestrian.

We see this in London cycle lanes. Some cycles are doing a commute, some are trying out for the olympics, some people are doing 25 on a electric scooter and these are alien - hard to predict because they don't obey our intuition about physics. A guy on a scooter does 10mph tops and puts his foot down a lot.