Which of the following is NOT a new safety technology?

Answer: D — None of the above

The answer indicates that all the listed options—ACC, VSS, and CMS—are indeed new safety technologies, thereby making "None of the above" the correct response to the question of which one is not a new safety technology. Adaptive Cruise Control (ACC) is a sophisticated system that automatically adjusts a vehicle's speed to maintain a safe distance from the vehicle ahead. This is especially beneficial in reducing the potential for rear-end collisions and promoting smoother traffic flow. Vehicle Stability Systems (VSS) are designed to help prevent skidding and loss of control during extreme steering maneuvers. This technology significantly enhances the safety of vehicles, especially in adverse road conditions, by selectively applying brakes to individual wheels. Collision Mitigation Systems (CMS) utilize sensors and cameras to detect potential collisions and provide warnings or even initiate braking to avoid or reduce the severity of an accident. This proactive measure is crucial in modern transportation safety advancements. Since each option is a recognized safety technology introduced to improve vehicle safety, "None of the above" accurately reflects that there are no outdated or irrelevant technologies among the choices provided.