That's why you're supposed to have separate bike lanes for bikes to ride on at full speed. Lots of cities have something like this. A path that cyclists use t

That's why you're supposed to have separate bike lanes for bikes to ride on at full speed. Lots of cities have something like this. A path that cyclists use to actually get somewhere in a short time should not be the same path that loafers with dogs use to bumble around and relax on. Cycling isn't just for fun; lots of people actually use it for transportation, because it's much faster and more efficient than walking. And there's nothing wrong with bumbling around with your dog (on a leash), but it's a very different activity than what the cyclists are doing. Similarly, you wouldn't have the busy airspace over an airport shared by people playing around with their R/C planes and drones.