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Calibration Of The Highway Safety Manual Safety Performance Function And Development Of Jurisdiction-Specific Models For Rural Two-Lane Two-Way Roads In Utah, Bradford Keith Brimley
Calibration Of The Highway Safety Manual Safety Performance Function And Development Of Jurisdiction-Specific Models For Rural Two-Lane Two-Way Roads In Utah, Bradford Keith Brimley
Theses and Dissertations
This thesis documents the results of the calibration of the Highway Safety Manual (HSM) safety performance function (SPF) for rural two-lane two-way roadway segments in Utah and the development of new SPFs using negative binomial and hierarchical Bayesian modeling techniques. SPFs estimate the safety of a roadway entity, such as a segment or intersection, in terms of number of crashes. The new SPFs were developed for comparison to the calibrated HSM SPF. This research was performed for the Utah Department of Transportation (UDOT).The study area was the state of Utah. Crash data from 2005-2007 on 157 selected study segments provided …