Crash safety refers to the measures and technologies designed to protect occupants in a vehicle during a collision. This includes features like seat belts, airbags, and crumple zones, which absorb impact energy and reduce injury risk. Vehicles are also tested for safety ratings, helping consumers choose safer options. Modern vehicles often come equipped with advanced safety systems, such as anti-lock braking systems and electronic stability control, which help prevent accidents. Additionally, crash test dummies are used in simulations to study the effects of crashes on human bodies, leading to improved safety designs and regulations in the automotive industry.