What is the primary function of seat belts in a vehicle during a collision?

The primary function of seat belts during a collision is to prevent ejection from the vehicle. In the event of a crash, a seat belt secures the occupant in place, reducing the risk of being thrown from the vehicle, which can lead to severe injuries or fatalities. Seat belts are designed to absorb some of the forces of a crash, helping to protect the passenger's vital organs and head by keeping them safely restrained within the confines of the vehicle.

While comfort during seating is an aspect of vehicle design, it is not a primary function of seat belts. Similarly, enhancements to stereo sound and navigation assistance are unrelated to the purpose of seat belts and focus instead on entertainment and driving aids. The design and testing of seat belts emphasize safety, specifically in preventing ejection and minimizing injury during collisions.