What physical characteristic must a bumper have to be compliant?

A bumper must be able to absorb shock to be compliant with safety regulations. This characteristic is critical because it helps to minimize damage to both the vehicle and its occupants during a collision. A shock-absorbing bumper can effectively reduce the force of impact, thereby protecting the structural integrity of the car and enhancing passenger safety.

In the context of vehicle design, the ability to absorb shock is largely dependent on materials and construction techniques that can deform under pressure, dissipating energy during an impact. This compliance feature is paramount for enhancing overall vehicle safety, making the vehicle more resilient in the event of a crash.

While flexibility and specific dimensions might be relevant considerations for bumper design, these do not specifically address the fundamental purpose of a bumper. Likewise, being narrow and lightweight may not enhance the safety function of the bumper and could potentially compromise protective capabilities. Therefore, shock absorption stands out as a non-negotiable requirement for compliance.