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Siemens is laying the technical foundation of a cross-national system of toll registration in Europe. The Sitraffic Sensus onboard unit determines the position of a vehicle either from satellite data or with the help of microwave communication. The unit thus covers all of the toll collection technologies that are currently in use. A special feature of the new onboard unit is its ability to utilize data from various satellite systems for vehicle positioning. For example, it enables precise positioning in cities where high-rises can block a satellite connection. The onboard unit complies with the European Electronic Toll Services (EETS) standard and can be used throughout Europe. Siemens recently presented this solution at the Intertraffic 2014 trade fair in Amsterdam.
Toll systems use an onboard unit to determine the position of a participating vehicle and compare this position with those of toll roads. The onboard unit uses information about the stretch of toll road the vehicle has traveled and recorded country-specific toll rates to calculate the amount of toll that is due. It can communicate this information to a central computer via a mobile telephone network. The vehicle's position is determined either with the help of a global navigation satellite system (GNSS) or via microwave signals between the onboard unit and receivers located on bridges (Dedicated Short Range Communication, DSRC). Because of varying regulations, 12 different toll systems are used throughout Europe today. Vehicles that regularly travel through several countries therefore have a whole series of onboard units. The goal of the European Electronic Toll Services (EETS) standard is to enable vehicles to travel throughout Europe with a single onboard unit in the future.
Country-specific regulations and calculation methods for tolls can be integrated into the Sitraffic Sensus units so that they can be used all over Europe. The onboard units communicate via microwaves and receive satellite data from three different navigation systems: the American system GPS, the Russian system GLONASS, and the European system Galileo. The latter is expected to make its first set of services available starting in early 2015. Sitraffic Sensus combines the available satellite data from the various systems and can therefore reliably determine a vehicle's position even in areas where reception is difficult. Tests in the city center of Vienna had shown that the combination of data from GPS and GLONASS enables much more precise positioning than a unit that uses only GPS. Sitraffic Sensus complies with all the currently applicable standards. These include the suites for DSRC that comply with the CEN standard, Uni-DSRC as an option, and the ISO/CEN standard for independent toll systems. Updates of the software and changes in the toll services are simply transferred to the onboard unit via GSM in the mobile network.
Reference Number: IN 2014.05.5e