Always maintain a space cushion between you and other vehicles on the road. This will allow you a safe exit for evasive maneuvering to avoid an emergency. Avoid driving along side of cars and especially trucks on a multi-lane street. You could be in another driver's blind spot which is on either side and slightly to the rear. Either speed up or drop back and put your vehicle where other drivers can see you.

You should have at least 2 seconds of distance at any speed between cars. Rear end collisions are more common than any other kind. They are due to driversfollowing each other too closely. If the car ahead stops, the car following cannot stop in time.