GIS-Based Traffic Safety Management for Highway Intersections

Intersection traffic safety management includes basic intersection information, safety evaluation, safety problem diagnosis, and countermeasure recommendations. In this paper, a new approach to improve the efficiency of safety evaluation is proposed: GIS-based model of safety level-of-service. Field ratings were used to initially screen intersection information. After entering intersection information into a computer model, the system automatically evaluates the safety of intersection, identifies existing safety problems and recommends prioritized countermeasures based on a benefit-cost ratio model. Initial results show the system improves the efficiency of evaluating and selecting intersection safety improvements.