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A roadside control device for checking the correct operation of a toll apparatus which is installed in a motor vehicle passing the control device and exhibiting an identifying license plate. The toll apparatus performs a satellite-supported electronic toll deduction and being equipped with the follo

A roadside control device for checking the correct operation of a toll apparatus which is installed in a motor vehicle passing the control device and exhibiting an identifying license plate. The toll apparatus performs a satellite-supported electronic toll deduction and being equipped with the following facilities:a) a communication device,b) a classification device,c) a trigger device,d) an evaluating device, ande) a recording device.

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1. A roadside control device for checking correct operation of a toll apparatus which is installed in a motor vehicle passing the control device and exhibiting an identifying license plate, the toll apparatus performing a satellite-supported electronic toll deduction, the control device comprising:a

1. A roadside control device for checking correct operation of a toll apparatus which is installed in a motor vehicle passing the control device and exhibiting an identifying license plate, the toll apparatus performing a satellite-supported electronic toll deduction, the control device comprising:a) communication means for wirelessly exchanging information with the toll apparatus in the passing vehicle, the information being pertinent to a current operating state of the toll apparatus; b) classification means for allocating the passing vehicle to a predetermined vehicle class; c) evaluating means for carrying out a plausibility check to determine whether the information received from the toll apparatus of the passing vehicle by the communication means comports with the vehicle class to which the passing vehicle is allocated by the classification means; d) recording means for recording the license plate of the passing vehicle in case of an unsuccessful exchange of information of the communication means with the toll apparatus of the passing vehicle or in case of a negative result of the plausibility check of the evaluating means; and e) trigger means for accurately timed activation of the communication means, the classification means, the evaluating means, and the recording means. 2. A control device as defined in claim 1, wherein the communication means includes a dedicated short-range communication (DSRC) device.3. A control device as defined in claim 2, wherein the communication means is a radio device for a frequency range from 2.4 to 5.8 GHz.4. A control device as defined in claim 1, wherein the communication means is a terminal for one of a cellular network (CN) and a data radio network.5. A control device as defined in claim 1, wherein the communication means is operative to conduct a dialog with the motor vehicle in encrypted form.6. A control device as defined in claim 1, wherein the classification means includes a sensor system which operates in accordance with one of an acoustic principle and an optical measuring principle.7. A control device as defined in claim 6, wherein the sensor classification means includes an electronic image sensor.8. A control device as defined in claim 7, wherein the classification means operates in accordance with an optical correlation principle.9. A control device as defined in claims 1, wherein the trigger means includes an image sensor followed by image processing.10. A control device as defined in claims 1, wherein the trigger means includes a radar sensor.11. A control device as defined in claims 1, wherein the trigger means includes a laser sensor.12. A control device as defined in claims 1, wherein the evaluating means is operative to compare the vehicle class transmitted by the toll apparatus of the motor vehicle via the communication means with the vehicle class determined by the classification means.13. A control device as defined in claims 1, wherein the recording means includes an electronic camera.14. A control device as defined in claims 13, wherein the classification means includes a sensor system including an electronic camera, the electronic camera of the recording device being physically identical to the electronic camera of the sensor system of the classification means.15. A control device as defined in claims 1, and further comprising a receiver for the satellite navigation system used by the toll apparatus, the evaluating means being operative to compare data determined by itself with data of the satellite navigation system interrogated from the toll apparatus, which data can be conducted to the evaluating means via the communication means.16. A control device as defined in claim 1, and further comprising a radio device via which a recording of the license plate of the motor vehicle can be transmitted to a control center in case of improper operation of the toll apparatus found by the evaluating means.17. A control device as defined in claim 16, and further comprising data compression means for transmitting data to the control center in compressed form.18. A control device as defined in claim 1, wherein the control device is mountable on one of a mast and a bridge construction which extends over a road on which the motor vehicle is driving.19. A control device as defined in claim 1, wherein the control device is arrangeable in a vehicle parked next to a road on which the motor vehicle is driving.20. A method for detecting correctness of operation of a satellite-supported electronic toll apparatus in a vehicle and for securing evidence in case of improper operation of the toll apparatus, comprising the steps of:wirelessly exchanging information between a control device and the toll apparatus in the passing vehicle using communication means of the control device, the information being pertinent to a current operating state of the toll apparatus; allocating the passing vehicle to a predetermined vehicle class using classification means of the control device; carrying out a plausibility check in evaluating means of the control device to determine whether the information received from the toll apparatus of the passing vehicle by the communication means comports with the vehicle class to which the passing vehicle is allocated by the classification means; recording the license plate of the passing vehicle in case of an unsuccessful exchange of information of the communication means with the toll apparatus of the passing vehicle or in case of a negative result of the plausibility check of the evaluating mean; and activating the communication means, the classification means, the evaluation means and the recording step in an accurately timed fashion.