What does it mean to drive in the “No Zone” of a large truck?

The “No Zone” includes the areas behind and on either side of a tractor-trailer in which the driver has very little or no visibility. Motorists should try to stay out of the areas at a short distance directly behind the truck or in the left or right rear quarters. If the truck driver fails to see your vehicle and executes a lane change, it could cause a serious collision.