Also, don't ride sidewalks. Many years ago, my 18+ year old son was riding on a sidewalk on a one way street. He was going opposite of traffic. A lady was making a left turn onto the one way street as he approached from her left. She pulled out and went right into him. Messed the bike up pretty badly but he was okay.
On a side note, she didn't even call her insurance company even though the police were called and a rescue squad showed up on the scene. Her insurance company gave us the run around until my mother in law called and got a hold of a supervisor. At the mention of lawsuit for $20,000 for fixing his bike and the pain and suffering that their client caused a visually impaired (my son is legally blind) young man who was just trying to renew his bus pass so he could get to and from the local college, they readily agreed to a $2,500 settlement f we would just go away. His bike was a Diamondback Sorrento which was a real cheap bike. His new bike was much much better.