The impact is exponential. A motorcycle is about 1/4 the size of a car, but needs less lanes to have a good traffic flow, or: Have a thousand motorcyclists goin

The impact is exponential. A motorcycle is about 1/4 the size of a car, but needs less lanes to have a good traffic flow, or: Have a thousand motorcyclists going down a two-lane highway, their traffic will be smoother and faster than a thousand cars going down a four lane highway.