Bicycles are dangerous vehicles to be on the road when cars are around. Just last night I was out on my twice a week bike ride, and just as I was nearing the completion of my grueling 4 mile circuit, a car backed out of the driveway not far from my house.
Mind you, this was about 12 midnight, and I had my front and rear strobes going, when the car pulled into the front yard and parked.
I wasn't wearing my glasses, and had my Radio Shack headphones on, when a beautiful blond exited the auto and said "Hi." It musta been the strobes she liked, but I said hi back, and I thnk she made a comment to furthur the conversation, but I was riding and had the radio on, and looking back at her too.
You see a lot of things on a bicycle you don't normally see in a car or on foot. It's a whole lot better than jogging. Gives you intervals of rest, and with gears, you can take it easy on yourself if need be. In my opinion, it's darn good and enjoyable exercise, long as it doesn't become an obsession, as athletes are prone to.
Riding on any main road is asking for trouble if cars are on the road at the same time.
Les