Road magnets for positioning of cars

As a potential key to the implementation of self-driving vehicles, Volvo Car Group has completed a research project using magnets in the roadway to help the car determine its position. Incorporating the technology in preventive safety systems could also help prevent run-off road accidents. A pattern of round ferrite magnets (40x15 mm) was located 200 mm below the road surface. The test car was equipped with several magnetic field sensors.