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https://www.nationalacademies.org/trb/events

Validation of HSM Crash Prediction Methods for Specific Intersection Types in Oregon

The Highway Safety Manual (HSM) is the national guidance of quantitative safety analysis used in highway transportation planning, alternatives development, highway design, operations, and maintenance. However, some crash prediction models and crash modification factors in the Highway Safety Manual were developed using data from other states, not Oregon. Therefore, it is necessary to validate these models and crash modification factors for the implementation in Oregon. Recently the National Cooperative Highway Research Program (NCHRP) project 17-68 “Intersection Crash Prediction Methods for the Highway Safety Manual” has developed crash prediction models of more intersection types for inclusion in the HSM. The types of intersections include all-way stop control, three-leg intersections with signal control on rural highways, intersections on high-speed urban and suburban arterials, five-leg intersections, etc. Currently, there is no guideline for how to use these new crash prediction models particularly in Oregon. It is necessary to validate these models and crash modification factors in Oregon to guide the statewide implementation. This research proposes to focus on intersections on urban and suburban arterials, which are common intersection types.