A drive guide system for guiding a motor vehicle from a start point to a destination point by displaying a travel locus of the motor vehicle on a map is disclosed. A drive route map from the start point to the destination point is divided into a plurality of sections and they are stored in a memory....http://www.google.com.hk/patents/US4550317?utm_source=gb-gplus-share專利 US4550317 - Drive guide display system for motor vehicle
