2011 Acura RL Owner's Manual - Page 328

Adaptive Cruise Control (ACC) If the vehicle ahead of you slows down abruptly, or if another vehicle cuts in front of you, a beeper sounds and a message appears on the multiinformation display to warn you. In this case, decelerate your vehicle by pressing the brake pedal, and keep an appropriate distance from the vehicle ahead. When a vehicle ahead is within ACC range and going at a steady speed Your vehicle follows the vehicle ahead of it, keeping a constant distance. ACC will not keep your vehicle at a constant distance if the vehicle ahead of you goes out of range of your set speed. If the vehicle ahead of you slows down and changes lanes, ACC no longer tracks it. Your vehicle will then return to your set speed. 322