Development of a New Procedure to Prioritize Intersection Safety Improvement211 Projects

摘要

As traffic demands increase, it is essential that transportation planners and211u001etraffic engineers consider possible improvements to the existing conditions of 211u001eroadway systems. A roadway intersection needs to be analyzed in terms of its 211u001esafety, geometric and operational conditions for the purpose of potential 211u001eimprovements. This report presents results obtained from a research project 211u001eperformed to develop a new procedure to prioritize intersections for safety 211u001eimprovements. The procedure developed through the study considers both safety 211u001eperformance and traffic operational performance. For safety, the benefit cost 211u001e(B/C) ratio was considered, and for traffic operational, average total delay. The 211u001estudy was conducted by reviewing existing reports and information databases, 211u001econducting field data collection for traffic turning movements and geometric 211u001econditions, and developing a new model with the use of a utility function and a 211u001elogit model to prioritize intersections. A case study was performed to test the 211u001emodel. Three priority lists for the year 1996 were determined as the application 211u001eof the new procedure. The first priority list was based on safety factors, the 211u001esecondary priority list on operational factors, and the third priority list on 211u001esafety and operational factors.