Using a combination of sensors and vehicle-to-vehicle communication, cooperative adaptive cruise control (CACC) takes cruise control to the next level, enabling vehicles to adjust their speed to the preceding vehicle in their lane. The CACC system can also respond more quickly to speed changes by the preceding vehicle and other vehicles farther ahead that are beyond the line of sight. These advancements improve the stability of traffic flow, increase driver confidence, and make shorter vehicle-following distances possible. Ultimately this results in better use of a highway’s effective capacity and greater fuel efficiency.