ACC stands for Adaptive Cruise Control. It's an advanced version of traditional cruise control that automatically adjusts your car's speed to maintain a safe following distance from the vehicle ahead. You set your desired maximum speed, and the system uses radar or cameras to monitor traffic, slowing down and speeding up as needed without you touching the brake or accelerator.
The core component is a radar sensor or camera, typically located in the grille or windshield. This sensor constantly scans the road, measuring the distance and relative speed of the car in front of you. Based on this data, the car's computer controls the throttle and brakes. You can usually adjust the following distance, which determines how much space the system leaves between you and the lead vehicle.
This technology is a key feature of advanced driver-assistance systems (ADAS). It significantly reduces driver fatigue on long highway drives and in stop-and-go traffic. However, it's crucial to remember that ACC is an assistance tool, not a replacement for an attentive driver. You must always be ready to take full control of the vehicle.
| Feature | Traditional Cruise Control | Adaptive Cruise Control (ACC) |
|---|
| Primary Function | Maintains a set speed | Maintains set speed AND a safe distance |
| Traffic Reaction | None; car continues at set speed | Automatically slows down for slower vehicles |
| Driver Input | Driver must brake and resume | System handles braking and acceleration |
| Best Use Case | Open highway with light traffic | Highways, heavy traffic, long commutes |
| Typical Minimum Speed | Around 25-30 mph | Can often function down to 0 mph (stop-and-go) |
Using ACC is straightforward. You activate it via a steering wheel or stalk button, set your speed, and choose a distance setting. If the lane ahead clears, the car will accelerate back to your preset speed. For safety, the system deactivates if you press the brake pedal or if certain conditions, like a sharp curve, are detected.
