What is Cooperative Adaptive Cruise Control?

The Cooperative Adaptive Cruise Control is an extension to the adaptive cruise control concept using Vehicle-to-Everything communication. CACC realises longitudinal automated vehicle control.In addition to the feedback loop used in the ACC, which uses Radar, Camera and/or LIDAR measurements to derive the range to the vehicle in front, the preceding vehicle's acceleration is used in a feed-forward loop. The preceding vehicle's acceleration is obtained from the Cooperative Awareness Messages it transmits using ETSI ITS-G5, DSRC / WAVE technology or LTE-V2X PC5 interface as part of the C-V2X technology. Generally, these messages are transmitted several times per second by future vehicles equipped with ITS capabilities.