I like to be that far from the side walk (4ft+) for an entirely different reason. If I go down I want to hit the road and skid on the road. I DO NOT wish to land on the edge of the sidewalk, that **** breaks bones way to easy. I don't worry about being visable to cars, because I KNOW from 25 years of being parked on turn on and buzzed....after I reach a certain speed, my molecules get all worked up and interact with the air around me and I become invisable. "I'm sorry I didn't see you"