Apparatus for the transfer of information in motor vehicle traffic

Apparatus for transferring information in motor vehicle traffic between a transmitter-building element of pavement forming a roadway and a receiver arranged in a motor vehicle, whereby the transmitter-building element transmits a coded information signal and said receiver of said vehicle driving over the transmitter-building element receives and analyzes the information signal and the transmitter-building element receives necessary energy to transmit the information signal from the vehicle driving over it;

• wherein the transmitter-building element includes a transponder having a means for being activated to emit a digital code signal in response to a changing magnetic field, said transmitter building element being mounted at a traffic-critical location in the roadway pavement at which it can be driven over by said vehicle;
• wherein the receiver has a loop antenna arranged in a floor area of the vehicle which transmits to the transponder the energy necessary for the transponder to transmit, and which receives an information signal transmitted by the transponder for guiding the vehicle;
• wherein the receiver includes an analyzing circuit coupled to the antenna for analyzing the information signal;
• wherein said apparatus further includes an indicating device coupled to the analyzing circuit for indicating information from the analyzed information signal in the vehicle;
• wherein there are at least two transmitter-building elements staggered along the roadway, constructed in the pavement thereof, each providing information regarding a driving direction of a motor vehicle;
• and
• wherein information signals from the at least two transmitter-building elements indicate a proper driving direction of a vehicle and the receiver gives off an alarm signal when the vehicle is driving in an opposite direction to the proper direction.

Apparatus for transferring information in motor vehicle traffic between a transmitter-building element of pavement forming a roadway and a receiver arranged in a motor vehicle, whereby the transmitter-building element transmits a coded information signal and said receiver of said vehicle driving over the transmitter-building element receives and analyzes the information signal and the transmitter-building element receives necessary energy to transmit the information signal from the vehicle driving over it;

• wherein the transmitter-building element includes a transponder having a means for being activated to emit a digital code signal in response to a changing magnetic field, said transmitter building element being mounted at a traffic-critical location in the roadway pavement at which it can be driven over by said vehicle;
• wherein the receiver has a loop antenna arranged in a floor area of the vehicle which transmits to the transponder the energy necessary for the transponder to transmit, and which receives an information signal transmitted by the transponder for guiding the vehicle;
• wherein the receiver includes an analyzing circuit coupled to the antenna for analyzing the information signal;
• wherein said apparatus further includes an indicating device coupled to the analyzing circuit for indicating information from the analyzed information signal in the vehicle;
• wherein the transmitter-building element includes a counter which includes means for beginning a count when driven over by a leading vehicle and means for measuring a spacing of a following vehicle from the leading vehicle by means of the counter's count.