How does Adaptive Cruise Control (ACC) work?

ACC maintains a set speed like conventional cruise control but automatically adjusts speed to maintain a safe following distance from vehicles ahead. System uses radar (and often camera) to detect lead vehicles, calculates time gap or distance, and controls throttle and brakes to maintain the set gap. When the lane clears, ACC accelerates back to the set speed. Advanced versions include stop-and-go capability for traffic, predictive efficiency (using navigation data), and integration with lane centering (L2 systems). ACC parameters include maximum speed setting, desired time gap, and acceleration/deceleration limits for comfort.