How should a seat belt fit properly to ensure maximum safety?

A seat belt should fit properly across the shoulder and chest without slack to ensure maximum safety. This positioning is crucial because it allows the seat belt to effectively restrain the occupant in the event of a collision. Proper fitting minimizes the risk of injury by distributing the force of a crash over the stronger parts of the body, such as the chest and pelvis. A snug fit prevents the occupant from slipping out of the belt or the vehicle during an impact, significantly reducing the likelihood of severe injuries.

In contrast, a loose fit or incorrect positioning, such as across the lap only or above the knees, does not provide adequate protection. A seat belt that is too loose can allow for excessive movement and increases the risk of injury. Proper use of a seat belt is a critical safety measure in vehicles, and understanding how to ensure a correct fit can save lives.