Improved Prediction Models for Crash Types and Crash Severities
The release of the Highway Safety Manual (HSM) by the American Association of State Highway and
Transportation Officials (AASHTO) in 2010 was a landmark event in the practice of road safety analysis.
Before it, the United States had no central repository for information about quantitative road safety
analysis methodology.
The TRB National Cooperative Highway Research Program's
NCHRP Web-Only Document 295:
Improved Prediction Models for Crash Types and Crash Severities
describes efforts to develop improved crash prediction methods for crash type and severity
for the three facility types covered in the HSM—specifically, two‐lane rural
highways, multilane rural highways, and urban/suburban arterials.
Supplemental materials to the Web-Only Document include
Appendices A, B, and C (Average Condition Models, Crash Severities – Ordered Probit Fractional Split Modeling Approach, and Draft Content for Highway Safety Manual, 2nd Edition).
This Summary Last Modified On: 5/10/2021