Vehicle restraints are designed to “lock” the trailer in position at the loading dock preventing unscheduled truck departure. In addition to mechanically locking the trailers rear impact guard in position the vehicle restraint safety system also provides visual communication to the truck driver and the loading dock attendant. The exterior red/green signal lights and sign package provides the truck driver with clear communication when it is safe to enter or leave the loading dock bay. The interior red/green/amber signal lights and sign package communicate to the dock attendant when it is safe to load/unload the truck. Successful installations are a combination of the presence and strength of the trailers rear impact guard, the strength of the buildings foundation wall that the restraint is anchored to, the design and capacity rating of the vehicle restraint and clear visual communication as to when it is safe to load and unload the truck or to move the truck.