AutoPASS is an
electronic toll collectionsystem used in Norway. It allows collecting road tolls automatically from cars. It uses electronic radiotransmitters and receivers operating at 5.8 GHz (MD5885) supplied by the Norwegian companies Q-Freeand Fenrits.
The system involves the installation of a
DSRCbased radio transponderon the windscreenof a vehicle, and to sign an agreement with one of the toll collection companies in Norway. Tolls are charged at toll plazas as before, but cars can drive past in up to 80 km/h. The system is administrated by the Norwegian Public Roads Administration. 23 of the 45 toll roads in Norway use the system, in addition to tests for use of the system on some car ferries. The primary reason that some projects don't support AutoPASS is that they charge both for the car and for passengers, which the system cannot support. All projects using AutoPASS can only charge per car. All systems with Autopass also have manual payment methods, though not nessesarilly manned.
Each AutoPASS unit contains a
microcontrollerwhich will process requests from the road side, and respond with the proper information to the road side.
There are 5 generations of
cryptographickey pairs inside each AutoPASS unit, which are unique for each unit. The cryptographic keys are used for authenticating the unit when passing a toll plaza, thus making it difficult to make fraudulent copies of a AutoPASS unit. Unlike similar DSRCbased tolling systems used in many countries, there is no access control in the Norwegian system, the unique ID within the unit is available to be read for those who have the proper DSRCequipment.
There is an internal storage space for 100 log entries, which are normally updated each time a vehicle owner is charged when passing a toll plaza. This is a collection of receipt entries which includes the time, date and the station identity of the toll plaza which did the tolling transaction.
Each AutoPASS unit features a move detect mechanism. When the unit is removed from the windscreen, an electrical switch will be activated, causing a flag to be set in processor within the AutoPASS unit. This flag will be registered when doing a tolling transaction the next time the unit passes a toll plaza.
upporting toll plazas
Bridges and tunnels:
Dedicated Short Range Communications
* [http://www.autopass.no/om_autopass/english.stm English version of Official site]
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