Autopass (stylized autoPASS) is an electronic toll collection system used in Norway. It allows collecting road tolls automatically from cars. It uses electronic radio transmitters and receivers operating at 5.8 GHz (MD5885) originally supplied by the Norwegian companies Q-Free and Fenrits. Since 2013 Kapsch and Norbit supplied the transponders. In 2016 the Norwegian Public Roads Administration revealed that they had chosen Norbit and Q-Free as suppliers of Autopass-transponders the next four years. With an AutoPASS contract it is also possible to use the tag in Denmark and Sweden on ferries and bridges through the EasyGo partnership. In December 2021, the Norwegian Public Roads Administration withdrew from EasyGo starting a transition period until 31 March 2022. AutoPASS providers need to be EETS-registered and approved by the operators in order for the OBE to be valid in those toll facilities after the transition period ends. In 2019 more and more ferry crossings are also using Autopass as a payment option through the "AutoPass for ferry" concept. A few crossings are automatic, but most are still manual. If you have a tag you pay only for the vehicle at fully automatic crossings with a 10% discount. If you apply for an Autopass ferry account, which is prepaid, you get a 50%(40% corporate) discount for vehicle, and 17% for passengers at manual payment crossings. See https://www.autopassferje.no for more information. Technology The system involves the installation of a DSRC based radio transponder on the windscreen of a vehicle, and to sign an agreement with one of the toll collection companies in Norway. Tolls are charged at toll plazas and cars can drive past in over . The system is administrated by the Norwegian Public Roads Administration. All public toll roads now use the electronic toll collection system. Each Autopass unit contains a microcontroller which will process requests from the road side, and respond with the proper information to the road side. There are 5 generations of cryptographic key 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 an Autopass unit. Unlike similar DSRC based tolling systems used in many countries, there is no access control in the Norwegian system, the unique ID within the unit being available for those who have the proper DSRC equipment. There is an internal storage