| 摘要 |
<p>The invention relates to a vehicle mountable unit for a road toll system comprising a billing system for billing a user of the road. The vehicle mountable unit (10) comprises a satellite navigation receiver (GPS) implementing a position tracking function and unit is adapted to communicate with a portable activation device (12) to receive information from the portable activation device concerning the owner of the portable activation device (12) and to provide information to the billing system (46) to enable identification of the owner of the portable activation device.</p> |
