The Safe Systems Approach focuses on minimizing which of the following aspects associated with a crash?

• A. Injury severity
• B. Response time
• C. Vehicle wear
• D. Impact energy

Answer: (D)

Minimizing the energy that has to be dissipated in a crash is the central idea here. The Safe Systems approach aims to design streets, speeds, and vehicles so that, if a collision occurs, the forces acting on people are as small as possible. Since injury risk and severity come from the amount of energy that must be absorbed during the impact, lowering impact energy directly reduces harm to road users. Speed greatly influences this energy (kinetic energy grows with speed, roughly squared), so strategies like slower speeds, better road design to absorb energy, and safer vehicle features all help reduce potential injuries. Other ideas like injury severity, response time, or vehicle wear describe outcomes or unrelated factors rather than the crash energy the system seeks to minimize.