What does Adaptive Cruise Control utilize to monitor the distance between vehicles?

Adaptive Cruise Control (ACC) primarily relies on radar technology to monitor the distance between vehicles. This system uses radar sensors located in the front of the vehicle to detect the speed and distance of the car ahead. When the system is activated, it continuously measures the time it takes for radar waves to bounce back after hitting the vehicle in front. By calculating this information, ACC can adjust the speed of the car accordingly, either accelerating to maintain a set speed or decelerating to keep a safe following distance.

While other technologies like cameras and sonar are used in various safety systems in vehicles, they are not the primary means for monitoring distance in Adaptive Cruise Control systems. Cameras, for instance, help with lane-keeping and visual recognition but do not function as effectively in measuring precise distances like radar. Similarly, sonar is generally utilized for close-proximity sensors, such as parking assistance, rather than maintaining cruise control adjustments over longer distances.