Automatic cruise control is an option available for road vehicles which enhances the safety level. This system can automatically control the vehicle speed and it maintains a safe distance from the vehicles ahead. Automatic cruise system is also known as adaptive cruise control, radar cruise control, traffic-aware cruise control or dynamic radar cruise control. This brilliant invention of cruise control slows down and speeds up accordingly. It works when the radar sensor indicates the traffic ahead and instructs the car to control the speed level. ACC is now almost paired with a pre-cash system. This is an ideal system for stop-and-go traffic and rush hour commuting which swings from 80mph to a sudden halt.