Audi lane assist – Audi lane assist is a high-tech assistance system previously only found in luxury cars, now available on the new Audi A4. Above a road speed of approximately 40mph, it warns the driver if the car is ‘wandering’ out of the chosen lane. A small black-and-white camera mounted on the windscreen above the inside mirror observes the road ahead of the car. It has a range of 60 metres and a viewing angle of about 40 degrees. A high-speed computer in the same housing identifies lane lines marked on the road surface and determines the car’s position in relation to them.
If the driver allows the car to stray in the direction of a lane marking but has not indicated that he or she intends to make a turn, Audi lane assist issues a warning in the form of a vibration through the steering wheel. Its intensity can be selected in three stages via the MMI. There are also three settings for the moment at which the warning is initiated: before a wheel reaches the line, when the line is crossed or according to the system’s own variable assessment of the situation.
Audi lane assist can be switched off if not required. A display on the instrument panel tells the driver when it is active but not capable of issuing a warning, possibly because the lane lines are not clearly marked or the car’s speed is too low.Published 9 February 2008