All it takes to cause a disaster is a single runway incursion. For example.: Tene Rief. Safety officials have identified the risks associated with runway incursions as one of the most urgent issues facing today's aviation community; as pilots, airport vehicle operators, air traffic controllers and flight service specialists continue to find themselves involved in runway incursion incidentsThe continued reduction of Runway Incursion Incidents (RII) and increased airport safety is a priority at the FAA as well as other agencies. Key to achieving these goals are continued research and analysis, identification of problems, prototyping and validation of proposed solutions, and, of course, education and training. Simulation is clearly an effective tool that can be used to reduce the number of runway incursion incidents. Already proven in diverse areas of airport operations and planning from conducting studies to analyze current airport operations to planning and validating new runway safety procedures, it can be used to generate the data needed to address RII.