This thesis presents an Adaptive Cruise Control (ACC) system which is an automotive feature that allows drivers to maintain preset speed while the system automatically monitors the traffic patterns and adjust the closing distance by acting on the throttle and the brakes to maintain a safe distance behind the vehicle ahead. It employs radar to measure the distance from the ACC vehicle to the vehicle in front and its speed relative to the ACC vehicle. The controller used is Proportional, Integral and Differen tial (PID) and tuned using Differential Evolution (DE) scheme which is used to choose the correct actuator for the current driving situation. The structure combines the speed control model and an additional control loop that is charged of verifying some sa fety and comfort constraints while the latter is charged with assuring a good tracking of the desired reference inter-vehicle distance. The system performance during Speed Control (Cruise Control), Following Distance Control (Headway Control) and Stop-and-Go situation on all road grades and for all speed ranges has been satisfactory and the proposed controller yields favourable overshoot, rise time and settling time as compared to similar works. The average safe stoppage distance behind a stationary object is 2 m.
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