What is the primary function of seat belts?

The primary function of seat belts is to secure occupants in their seats and reduce the risk of injury in a collision. When a vehicle suddenly stops or collides with another object, the laws of physics dictate that an unrestrained occupant will continue to move forward at the same speed as the vehicle until acted upon by an external force. Seat belts are designed to restrain the occupants, preventing them from being thrown from the vehicle or colliding with interior elements, thereby substantially decreasing the likelihood of severe injuries.

Additionally, seat belts work in conjunction with airbags to provide a comprehensive safety system. By keeping passengers in a secure position, seat belts can help ensure the airbags deploy effectively, as they can provide the necessary cushioning to further reduce the impact of a crash. This safety feature is a critical aspect of vehicle design and is fundamental to occupant safety standards.