The Salvo™ Chock is an interlocking wheel chock designed for restraint of straight trucks and other vehicles that cannot be locked out with a glad hand lock. Suited for demanding loading yard conditions, the unit is light, strong, easy to use and fast to maneuver. The system restrains vehicles at loading docks during loading or unloading. Its technology uses safety interlocking to eliminate human error and enforce safety procedures. If the unit is not properly fitted, the loading dock door cannot be opened. Drivers position the chock and clamp the two halves together around the wheel using a convenient foot pedal, releasing the trapped key. The key is then transferred to the loading dock control panel, allowing the loader inside the warehouse to open the door and begin safely loading or unloading.