How should head restraints be positioned for optimal safety?

For optimal safety, head restraints should be positioned slightly above the top of the ear. This positioning helps to reduce the risk of neck injuries, particularly in the event of a rear-end collision. When the head restraint is correctly aligned, it serves to limit backward movement of the head and helps absorb energy during an impact, minimizing the likelihood of whiplash.

If the head restraint is too low, it may not provide adequate support for the head and neck. Positioning it at ear level or lower does not effectively prevent the head from moving too far back during a crash. Conversely, placing it at the top of the head may lead to discomfort and decreased effectiveness, as it tends to be out of alignment with the head and neck during a collision. Thus, positioning the head restraint slightly above the top of the ear ensures a protective fit that enhances safety.