Adaptive cruise control (ACC) is an advanced driver-assistance system for road vehicles that automatically adjusts the vehicle speed to maintain a safe distance from vehicles ahead.
Control is based on sensor information from on-board sensors. Such systems may use a radar or laser sensor or a camera setup allowing the vehicle to brake when it detects the car is approaching another vehicle ahead, then accelerate when traffic allows it to.
ACC technology is widely regarded as a key component of future generations of intelligent cars. They impact driver safety and convenience as well as increasing road capacity by maintaining optimal separation between vehicles and reducing driver errors.