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Trinity's plastic wedge chock securement system secures automobiles on rail cars during transit with chocks and a single strap instead of a traditional chain tie-down system. By utilizing the auto's suspension, the system reduces in-transit stress to the vehicle's structure and eliminates the need for securement holes in auto bodies, the company says. The system is standard for all auto makes, and rack cars equipped become universal instead of being unique to a manufacturer's service.