A plurality of vehicle service stations are located in a geographical area, each station includes one or more service bays in which the vehicle is serviced, each bay has an associated lane in which one or more vehicles wait their turn to be serviced in the bay, each lane has one or more sensors for sensing...http://www.google.com/patents/US5163000?utm_source=gb-gplus-sharePatent US5163000 - Vehicle waiting time indicator
