Don't Get Doored! - Whenever you're pedaling past parked cars, remain alert for drivers exiting. Should they swing open their door, you'll have to react quickly to avoid a collision that may seriously injure you and damage your bike. It's called getting "doored," and take our word for it, it's no fun! One secret to avoiding it is looking into the cars ahead (you can also look into their windshield-mount rear-view mirrors). If you see that someone's sitting in the car, give the car a wide berth. In fact, to be safe, it's best to never assume a parked car is empty.