My normal riding speed is 18 mph; maybe up to 24 mph if I'm in a hurry. But I can ride along with traffic if I'm forced to, and I have the option of throttle to get me out of a hairy situation; which can be necessary if braking or maneuvering aren't options in the situation. I'm on an ebike to avoid riding a motorcycle, since I don't have the reaction time that I had when I was younger, and on a motorcycle, I like going fast. I have 300k miles on motorcycles, and I'm still alive. There were so many situations where the only available escape route was to apply a lot of power and get ahead of the problem; so for me, it's safer to have the power on tap, even if you don't use it. My wife knew that too, and would never ride passenger on a smaller bike. If it wasn't over a liter, she wouldn't get on it.