The traffic jam assist system uses a radar sensor mounted inside the front grille and a camera mounted to the upper portion of the windshield to detect and monitor left and right white (yellow) traffic lane lines as well as any vehicle ahead. Based on inputs from the radar sensor and camera, the system adjusts the speed of your vehicle to maintain a set interval between your vehicle and the one detected ahead. It also applies steering torque to keep your vehicle in the center of the detected lane when you are driving in heavy traffic.