Crash test ummies are full-scale anthropometric test devices (ATD) that simulate the dimensions, weight proportions and articulation of the human body, and are usually instrumented to record data about the dynamic behavior of the ATD in simulated vehicle impacts. This data can include variables such as velocity of impact, crushing force, bending, folding, or torque of the body, and deceleration rates during a collision for use in crash tests. They remain indispensable in the development of and ergonomics in all types of vehicles, from automobiles to aircraft.