OPEL INSIGNIA-VAUXHALL

Like the BMW 7 Series, the Opel (or Vauxhall) Insignia can read road signs using a camera mounted near the rear-view mirror. For European road signs, the Insignia compares scanned images about 300 meters from the car, at about 30 frame captures per second, against a vast database of legal road signs, then reports this speed to the driver. This helps on long road trips or in conditions where there are too many road signs to track.