What is the benefit of using adaptive cruise control (ACC) on motorways?

Adaptive cruise control (ACC) is designed to enhance safety and ease of driving on motorways. The selected benefits are both correct because:

1. It reduces the probability of rear-end collisions: ACC automatically adjusts your vehicle's speed to maintain a safe distance from the vehicle in front, significantly lowering the chances of a collision caused by sudden stops or slow traffic.

2. The driver is assisted in maintaining the chosen distance: This feature continually monitors the distance to the vehicle ahead and adjusts the speed accordingly, allowing the driver to focus better on the road without the constant need to adjust speed manually.

The third option, stating that the safety distance cannot be undercut, is related but not included in the correct answer. While ACC helps to maintain a safe distance, the system does not impose a legal requirement that prevents the distance from decreasing. Instead, it's the driver's responsibility to ensure that sufficient distance is maintained, as stipulated by German traffic regulations. Understanding all aspects of ACC helps drivers utilize the system effectively while adhering to safety laws.