Nearly 2,000 full-scale crash tests have been performed at TTI's Proving Grounds Research Facility since the Institute began testing in 1965. Today, researchers in the Roadside Safety and Physical Security division continue to conduct crash tests on a variety of safety devices, crash cushions, and barrier systems with a wide spectrum of vehicles from subcompacts and three-quarter-ton trucks to 80,000-pount tractor trailer rigs. TTI also utilizes advanced computer simulation to economically enhance the validity of many tests.