Abstract: System for controlling vehicles in a traffic network. The vehicles (4) comprise communication means (5), for communication, via a communication network (2), with a service mediator system (1), linking the vehicle's communication means to various servers (9a . . . i). The vehicle may comprise means (6) for exchanging data between the vehicles' software or hardware, while at least one of said servers comprises means for processing said data related to the vehicles' software or hardware, like fuel consumption and the vehicles' maintenance state. The vehicle's communication means may comprise location means, enabled for exchanging data relative to the vehicles' location to be used for planning and scheduling the use of the vehicles, route planning, billing vehicle related tax or insurance. One or more servers may be enabled to process requests for vehicle parking or for hiring alternative transportation room or means. One server may be enabled for automatic processing vehicle accidents.

Abstract: Information system for a traffic network (1). Information of importance to travellers is transmitted by a transmitter system (3) to data receivers (pagers) in vehicles (2) making use of the traffic network. The traffic network is broken down into information regions (6). The transmitter system transmits information modules (5) which each relate to an information region and which are characterised by a region-identification code (ID1, ID2 etc.). The information system comprises means for transmitting, upon entry by a vehicle of an information region, to the data receiver in said vehicle the region-identification code of said region, the data receiver setting itself using said region-identification code for receiving information characterised by said region-information code, transmitted by the transmitter system. The region-identification code in the data receiver may be set using regional or local beacon transmitters (4) which transmit one or two region-identification codes.

Abstract: Known tags which are capable of receiving and demodulating signals by way of one and the same antenna and by way of one and the same diode, as well as being capable of modulating and transmitting signals, often have a poor efficiency, particularly if the antenna is implemented in the form of a flat plate. By coupling a high-ohm first terminal of the antenna to the diode, and coupling a low-ohm second terminal to earth by way of an inductive element, there is obtained a tag which has a good efficiency, both regarding the reception and demodulation of signals and regarding the modulation and transmission of signals.