Patent ID: 7006915

Claim:
A system for recording a vehicle, when using selected roads, comprising: recording means, said recording means comprising a computer unit, said computer unit comprising a road map memory for storing in digital form a road map data representing selected roads and other roads and areas, so that vehicles on said selected roads being recorded in said road map memory and vehicles on said other roads and areas are not being recorded; position determining means for determining position of said vehicles and for providing vehicle coordinate signals representing said vehicle coordinates referenced to said road map data; means on said vehicles for transmitting said coordinate signals to said recording means; said stored road map data further comprising digital information representing substantially rectangular segments overlying said selected roads represented by said road map data and having lengths oriented substantially in the direction of said selected roads and widths substantially transverse to the directions of said selected roads; said widths being variable along said selected roads so as to exclude from said segments said other roads and areas in which said vehicles are not being recorded; means for activating recording of said vehicles preventing said activation before the coordinates represented by said coordinate signal enter one of said substantially rectangular digital segment; and means for de-activating recording of said vehicles upon said coordinates represented by said coordinate signal leaving said substantially rectangular digital segment.