Develop Calibration Factors for Crash Prediction Models for Rural Two-Lane Roadways in Illinois

This paper documents the development of calibration factors for crash prediction models in the new Highway Safety Manual (HSM) for rural two-lane roadways in Illinois. The crash prediction modes (so called Safety Performance Functions (SPF)) in the HSM were developed using data from multiple states,...

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Bibliographic Details
Published inProcedia, social and behavioral sciences Vol. 43; pp. 330 - 338
Main Authors Williamson, Michael, Zhou, Huaguo
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2012
Subjects
Calibration Factor
Highway Safety Manual
Safety
Safety Performance Function
Safety
Calibration Factor
Highway Safety Manual
Safety Performance Function
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Summary:This paper documents the development of calibration factors for crash prediction models in the new Highway Safety Manual (HSM) for rural two-lane roadways in Illinois. The crash prediction modes (so called Safety Performance Functions (SPF)) in the HSM were developed using data from multiple states, therefore the models must be calibrated to account for local factors, such as weather, roadway conditions, and drivers’ characteristics. In this study, two calibration factors were developed for two different SPFs to give a better prediction of crash frequencies on rural two lane roadways in Illinois.
ISSN:1877-0428
1877-0428
DOI:10.1016/j.sbspro.2012.04.106