Crash Prediction Method for Freeway Facilities with High Occupancy Vehicle (HOV) and High Occupancy Toll (HOT) Lanes

The objective of the research is to develop a predictive method to address crash frequency and severity for freeway facilities, and associated ramps, with high occupancy vehicle (HOV) and high occupancy toll (HOT) lanes. The predictive methods developed in this research will include safety performance functions, crash modification factors, and calibration factors in a format that is consistent with the predictive methods in the existing Highway Safety Manaul (HSM) Part C. They will be sensitive to the traffic volumes on the freeways and ramps. The methods will be sensitive to the design elements and traffic control features considered by engineers and planners during the project development process. The scope of the research will be limited to urban freeways, where most of these facilities would be considered.