Adaptive cruise control with Porsche Active Safe (PAS) automatically regulates the speed of your vehicle in line with that of the vehicle in front. In the event of a sudden decrease in distance, the system reduces your speed – even down to a halt. The optional Lane Change Assist (LCA) system monitors the area behind and to the side of the vehicle. At speeds of 30 km/h or more, it alerts the driver to a vehicle in the adjacent lane via a visual signal. If the indicators are activated, LEDs in the exterior mirrors provide a flashing signal, warning the driver of a vehicle in the blind spot.