Graduate Thesis Or Dissertation
 

Calibrating the highway safety manual predictive methods for Oregon rural state highways

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7m01bq095

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  • The first edition of the Highway Safety Manual (HSM) provides a quantitative approach to predict the safety of transportation facilities based on the recently developed scientific methods. This approach, known as the predictive method, was developed for several states in the United States. Due to differences in driver population, weather condition and other issues, the State of Oregon is expected to calibrate these predictive models before using them. By locality, the existing predictive methods can be divided into two parts: rural highway predictive method and urban highway predictive method. This thesis focuses on the calibration project for the rural predictive models. Therefore, in the first part of this thesis, the author will illustrate the calibration process and calibration results for the rural facility types, including rural two-lane, two-way roads and rural multilane highways. Also, after the calibration project, the author found a new calibration sample size estimation procedure which is more statistically reliable than the current HSM sample size determination process. This new statistical estimation method will be explained and recommended for future calibration projects.
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file details Thesis_for_Fei_Xie.pdf 2017-08-19 公开 下载