Trucks and other large vehicles have large blind spots, called No-Zones. The rear No-Zone of a tractor-trailer can extend 200 feet behind the truck. Stay far behind a truck that is about to back up or is backing up. Never tailgate a truck or remain sandwiched between trucks. Give more road space to a truck that is making a wide turn. Leave space when you must stop behind a truck, especially if you're facing uphill. When the truck first starts to move, it may roll backward slightly.