What is the primary function of Adaptive Cruise Control (ACC)?

The primary function of Adaptive Cruise Control (ACC) is to maintain a safe distance from vehicles ahead. ACC is an advanced driver-assistance system that enhances traditional cruise control by using sensors to monitor the speed and distance of the vehicle in front. When the system is activated, it automatically adjusts the vehicle's speed to keep a preset distance from the car ahead, allowing for smoother driving in various traffic conditions.

This functionality not only helps to reduce the likelihood of collisions but also contributes to a more relaxed driving experience, as it alleviates the need for constant speed adjustments and distance monitoring by the driver. By maintaining a safe following distance, ACC plays a crucial role in enhancing road safety and overall traffic flow.

Other choices do pertain to different aspects of vehicle assistance and maintenance. For instance, lane-keeping assistance is focused on helping the vehicle stay centered in its lane; monitoring tire pressure is crucial for vehicle safety and efficiency but is unrelated to cruise control; and controlling fuel efficiency is more about the engine's operation than traffic management. However, these features serve different purposes and do not encapsulate the core function of Adaptive Cruise Control.