How should the lap portion of a seatbelt be positioned?

The lap portion of a seatbelt should be positioned flat, snugly, and low on the hips for several critical safety reasons. When the lap belt is positioned in this manner, it helps to distribute the force of a collision across the strong pelvic bones, which reduces the risk of injury to vital organs, including the abdomen. This positioning also minimizes the chances of the occupant sliding under the belt, a phenomenon known as “submarining,” which can lead to serious injury during a crash.

Correct positioning helps ensure that the seatbelt functions as intended, providing protection by keeping the occupant securely in place during sudden stops or collisions. A snug fit is essential because a loose seatbelt compromises its effectiveness, leading to movement that can increase the potential for injuries. Additionally, placing the belt high on the torso or tight against the stomach can be harmful by causing abdominal injuries in an accident or diminishing the restraint's effectiveness, increasing the risk of the occupant being ejected from the vehicle. Thus, the appropriate and safe positioning of the lap belt is paramount in enhancing occupant safety.