In today scenario driver assistance systems such as adaptive cruise control play an important role not only in avoiding accidents but also regulating traffic. The traditional Adaptive cruise control (ACC) system have been added vehicle to vehicle (V2V) communication which enables to transfer speed, acceleration, sensor which plays a key role in the Cooperative adaptive cruise control. The ACC system compared to the CACC system lacks string stability, which is an important factor for smooth transition between states. This paper describes the key features of the ACC system with the advantages of the CACC system. Also we have analyzed the modern predictive control of the ACC system which is an important factor for fuel saving. © IAEME Publication.