摘要 |
<p>The method involves setting a controlled area (K) within the electronic image of a road network, and assigning the coverage (E) in extended spatial manner within the set controlled area. A position determining unit sends vehicle position data (PK) within the controlled area to a management unit to determine vehicle position (PE) within the controlled area and outside the assigned coverage in the electronic image of the road network. The position determining unit uses signals from a satellite navigation system to determine vehicle position.</p> |