Calibration of the Highway Safety Manual for Missouri [2014]

Sun, Carlos; Brown, Henry; Edara, Praveen; Claros, Boris; Nam, Kyoungmin; University of Missouri--Columbia. Department of Civil and Environmental Engineering

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Calibration of the Highway Safety Manual for Missouri [2014]

2014-02-01
By Sun, Carlos ; Brown, Henry ; Edara, Praveen ; ...

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Creators:

Sun, Carlos ; Brown, Henry ; Edara, Praveen ; Claros, Boris ; Nam, Kyoungmin

Sun, Carlos ; Brown, Henry ; Edara, Praveen ; Claros, Boris ; Nam, Kyoungmin Less -
Corporate Creators:

University of Missouri--Columbia. Department of Civil and Environmental Engineering
Corporate Contributors:

Mid-America Transportation Center ; United States. Federal Highway Administration

Mid-America Transportation Center ; United States. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Calibration Crash Risk Forecasting Data Collection Highway Safety Information Processing Manuals Mathematical Prediction Random Sampling State Departments Of Transportation
Publication/ Report Number:

cmr14-007
Resource Type:

Tech Report
Geographical Coverage:

Missouri
Corporate Publisher:

Missouri. Dept. of Transportation. Research, Development and Technology Division
Abstract:

The new Highway Safety Manual (HSM) contains predictive models that need to be calibrated to local conditions. This calibration process requires detailed data types, such as crash frequencies, traffic volumes, geometrics, and land-use. The HSM does not document in detail techniques for gathering such data, since data systems vary significantly across states. The calibration process also requires certain decisions, such as the correct sampling approach, determination of the minimum segment length, the treatment of left-turn phasing, and the inclusion or exclusion of speed-change lane crashes. This report describes the challenges, practical solutions, and results from a statewide HSM calibration in Missouri, including lessons learned from other states such as Kansas, Illinois, and New Hampshire. The models calibrated included five segment and eight intersection site types, as well as three freeway segment types that will be part of the next edition of the HSM. The applied random sampling technique ensured geographic representativeness across the state. A variety of data processing techniques were utilized, including CAD, which was used to obtain geometric data. Some of the challenges encountered during calibration included data availability, obtaining a sufficient sample size for certain site types, maintaining a balance between segment homogeneity and minimum segment length, and excluding inconsistent crash data. The calibration results indicated that the HSM predicted Missouri crashes reasonably well, with the exception of a few site types for which it may be desirable for Missouri to develop its own SPFs.
Format:

PDF
Funding:

TR201302
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:0161f57abaa65075ebe92a1fe475b37334e965ffdd845b5607539683d4139b3c
Download URL:

https://rosap.ntl.bts.gov/view/dot/27022/dot_27022_DS1.pdf
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Calibration of the Highway Safety Manual for Missouri [2014]

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