The Cooperative Adaptive Cruise Control (CACC) is an extension to the Adaptive cruise control concept.CACC realises longitudinal automated vehicle control.In addition to the feedback loop used in the ACC, which uses Radar 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 DSRC or WAVE technology (IEEE 802.11p). Generally, these messages are transmitted several times per second by future vehicles equipped with ITS capabilities.