Abstract: A system and method for monitoring and recording the number of miles that a vehicle has traveled within each of a set of geographic entities. A vehicle position determination system is installed on-board the vehicle for generating a present vehicle location point. A memory is provided for storing for each of the entities a set of ordered coordinate data points representing the boundary of the entity. A processor is coupled with the position determination system and the memory for comparing the present vehicle location point to the boundary coordinate data points of an entity, including generating a ray emanating from the location point and determining if said ray crosses the boundary of the entity an even or odd number of times.

Abstract: A system (10) and method for detecting a speed sensor failure in a vehicle equipped with a geographic position determining system such as a GPS system (14). An on-board processor (12) compares vehicle travel distance calculations made using speed sensor (20) information to distance calculations performed using positional information. Discrepancies therebetween are used to indicate errors in the information provided by the speed sensor, or conversely, by the positioning system.

Abstract: A system and method for monitoring and recording the number of miles that a vehicle has traveled within each of a set of geographic entities. Current vehicle location data points are compared to entity boundary line approximations to determine which of a set of entities the location point falls within. Once an entity has been confirmed for a given location point obtained, the incremental mileage traveled by the vehicle since the previous location point was obtained is added to an accumulated mileage value for that entity.