The autonomous intelligent cruise control* system (ART) relieves the burden on the driver on arterial routes and motorways. If ART detects a slower-moving vehicle ahead, it automatically decelerates the coach until a distance preselected by the driver is reached. ART then constantly maintains this distance. For this purpose, a distance sensor scans the surroundings in front of the bus every 50 milliseconds. It uses three radar beams to measure the distance and relative speed of vehicles ahead up to a maximum distance of 200 m.
ART measures the relative speed with an accuracy of 0.7 km/h. If no vehicle is detected ahead, it operates like a cruise control. Autonomous intelligent cruise control assists the driver, especially in medium to heavy traffic on main roads, and largely eliminates the need for adaptive braking. Deceleration is limited to approx. 20 % of the maximum braking force.
The distance set via ART is speed-dependent and can be specified as a percentage ratio of the speedometer reading. In the default setting, for example, ART sets a distance of about 60 % of the speedometer reading difference. From this setting, the driver can adjust the desired distance upwards or downwards in defined steps.
The heart of ART is a distance radar mounted in the centre of the vehicle. It constantly switches back and forth between the three radar beams. These are emitted by the system and are directed such that the lanes are monitored to the left, right and centre in the direction of travel.