Originally Posted by 2manybikes
It is illegal in my state. This law was passed using statistics, I believe, showing how dangerous it is.
Show me these statistics! Google and I can't find 'em.
Your hearing is a tool for helping you figure out what's around you, but it's not exactly a good one. Can you hear an electric car? A faster cyclist? A speedster on rollerblades? You need to look back or at least use a mirror to have much of an idea about what's about to overtake you.