International Conference on Transportation and Development 2020
HSM Calibration, Quality Assessment, and Calibration Function Development for Crossroad Ramp Terminals Using Kansas Data
Publication: International Conference on Transportation and Development 2020
ABSTRACT
This paper documents the calibration of the highway safety manual (HSM) safety performance functions (SPFs), quality assessment of calibrated HSM SPFs, and development of calibration functions for crossroad ramp terminals using Kansas crash data from 2014 to 2016. As SPFs in the HSM were developed using data from several states, these crash prediction models must be calibrated to improve the crash prediction accuracy of a locality. For this calibration, 120 stop-controlled ramp terminals and 74 signal-controlled ramp terminals were used. Considering both stop-controlled and signal-controlled crossroad ramp terminals, the HSM methodology underpredicted fatal and injury crashes and overpredicted property damage only crashes in Kansas. Estimated calibration factors for crossroad ramp terminals were satisfactory; however, calibration functions produced better fitted models that improved the fit to local data. The estimated calibration factors and calibration functions greatly benefit in making accurate decisions related to ramp terminal safety in Kansas.
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Information & Authors
Information
Published In
International Conference on Transportation and Development 2020
Pages: 107 - 118
Editor: Guohui Zhang, Ph.D., University of Hawaii
ISBN (Online): 978-0-7844-8314-5
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Aug 31, 2020
Published in print: Aug 31, 2020
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