intelligent cruise assist

Adaptive cruise control (ACC) is a type of advanced driver-assistance system for road vehicles that automatically adjusts the vehicle speed to maintain a safe distance from vehicles ahead. Using sensors such as radar, lidar, or cameras, ACC can slow the vehicle when traffic ahead reduces speed and accelerate back to a preset speed when the road is clear.
First introduced in the 1990s, ACC has evolved from early laser based systems to more advanced radar and camera-based technologies capable of operating at a full speed ranges, including stop-and-go traffic.
ACC is considered a key component of partially automated driving. Under SAE International's classification, most ACC systems are categorized as Level 1 automation, as they control longitudinal vehicle motion but require continuous driver supervision and do not provide full vehicle autonomy. When combined with steering assistance features such as lane centering, the system may qualify as Level 2 automation.

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