Here in NYC there is a growing population of delivery riders on electric bikes. They often ride faster than cars drive, and in between moving & parked cars. They are quiet and fast. I don't have stats but it wouldn't surprise me if they have, perhaps cause, more accidents than standard bicycles. There was a recent 'crackdown' on throttle driven bikes (as opposed to pedal assist designs) - I don't know the differences - was this motivated by statistics, fear, or both?