CALTRANS DISTRICT 12 REAL-TIME EXPERT SYSTEM FOR FREEWAY INCIDENT MANAGEMENT. FINAL REPORT

This report describes the development of a prototype, multi-user, networked, real-time knowledge-based expert system (KBES) to provide decision support to California Department of Transportation (Caltrans) and California Highway Patrol (CHP) traffic management center (TMC) operators so they can more effectively carry out their functions. The research focuses on developing an operational management and response system using knowledge obtained from experts in the traffic management field. Knowledge specific to Caltrans District 12 in Orange County, California, was obtained from traffic management specialists and placed in the KBES. The prototype system, named FIM for Freeway Incident Manager, is implemented in G2, a real-time expert system shell, and is currently in the field at the new Caltrans District 12 TMC in Orange County. This report describes the development of incident detection, verification, and response knowledge bases for the system. It also describes the implementation of the system using G2 real-time KBES development software on a Sun SPARCstation. It concludes with a discussion of directions for future research, including the integration of the expert system with other automated TMC functions such as integrated ramp metering and changeable message sign control so that the KBES can provide an integrated management environment for the TMC.