Abstract: An installation for the control of a traffic light system by means of vehicles which are equipped with devices for automatic determination of position, i.e. bearing determination, and which includes therefore a first, transmission/reception antenna having a transmission direction perpendicular to the direction of travel for the transmission of bearing information, and a second antenna, arranged to transmit in the direction of travel, for the transmission of transfer messages or commands for control of lights of such a traffic light system. Means are also provided for selectively determining the type of signals to be transmitted and the corresponding antenna for such transmission.

Abstract: In one illustrated embodiment involving a railway communication system, about ten send-receive stations form a transmission section operating at one pair of frequencies in the range above one gigahertz, the stations being arranged at about one kilometer intervals along the route for radio communication with mobile stations moving therealong. A next succeeding similar transmission section operates at a different pair of send and receive frequencies above one gigahertz. All of the stations of a given transmission section may be in communication with a main station by means of a parallel cable connection. A central station then may communicate with mobile stations via the respective main stations. In another embodiment, the stations are implemented as microwave relay stations linked to a main station by the same antenna system used for communication with the mobile stations.