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DSDC's airport research during its global positioning system (GPS)-based runway incursion avoidance analysis and demonstration activities conducted at Manchester (NH) Airport is summarized. Based on the integration of realtime enhanced GPS and automatic dependent surveillance (ADS) with highly accurate three-dimensional airport maps, DSDC's Airport Control/Management System (AC&M) has the capability to provide all-weather air and ground navigation and control for a variety of vehicles within the airport terminal area. Realtime collision prediction algorithms, based on the GPS inputs, are used to alert the pilot and air traffic controller of potential incursions and collisions. The demonstration system includes an automated lighting control interface which is simulated using a large model of the airport.