Develop tools for evaluating the risk of runway incursions based on airport-specific factors such as airfield configuration, weather, aircraft operations, aircraft characteristics, and air traffic management practices. This project would involve data collection from historical runway incursion event data for storage in a relational database. These events would be classified by type following FAA and international taxonomy. Separate models would be developed for each type of event. The models would employ independent variables identified as either causal or contributing factors for the occurrence of the event. Separate models would be developed to determine the likelihood of an incursion and the severity of the incursion using estimates of aircraft separation and speeds. The results would be a tool that airport planners and designers could use to evaluate runway incursion risk potential associated with specific airport operations and proposed changes to airfield configurations.