What is adaptive cruise control? How does it work?

Adaptive cruise control or ACC is an advanced type of cruise control system that monitors traffic around the driver and allows them to maintain a set speed and/or following distance. After the driver triggers the system, devices mounted on the front of the vehicle begin a scan for other objects within a specific distance. If the ACC senses an object, it analyzes the distance and relative speed and then automatically makes adjustments to the brakes or accelerator to keep the desired speed and distance.