Securement systems keep cargo secured by using one or more of the vehicle’s structures, securement devices, or blocking and bracing equipment. To meet the securement requirement, each securement system must be able to support 80 percent of the cargo’s weight while braking or driving straight ahead, and 50 percent of the cargo’s weight while accelerating, driving uphill, or braking in reverse. In addition, the system should be able to support 50 percent of the vehicle’s weight while driving over bumpy roads or over the top of a hill. Other specific requirements may apply depending on the cargo’s characteristics.