A system and method for monitoring and recording the mileage a truck travels within a particular state including a GPS receiver, an odometer, and a memory device which contains state boundary information and a processor for determining on a continual basis whether the positioned information received...http://www.google.co.uk/patents/US5359528?utm_source=gb-gplus-sharePatent US5359528 - System for accurately determining the mileage traveled by a vehicle within a state without human intervention
