DEVICE IN A VEHICLE TO DETERMINE ENTRY INTO A PARTIAL SECTION OF A PREDETERMINED ROAD SYSTEM

摘要

The invention relates to a device in a vehicle to determine entry into a section of a predetermined road system, especially one subject to a fee for use, of a vehicle, which comprises a receiving system, a computer and stores. To permit a fast and reliable decision whether a vehicle is travelling on a predetermined road system defined by a digitised map, the invention proposes that the road system be divided into sections using identification points and by means of key points to ensure that linear connecting stretches (segments) form a polygon line approximating the actual road layout and that the section concerned is recorded by the computer as having been used if the sliding mean of the perpendicular distances of the vehicle positions found from the next section of the polygonal line has remained below a threshold distance over all segments of the selection without exception.