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Analysis and Identification of Two-Lane Rural Highway Hazard Index

Mirzanamadi, Raheb | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43899 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Nassiri, Habibollah
  7. Abstract:
  8. Identification of hazardous locations and improvement of these locations are the basis of most highway safety inspection programs. In most cases, performance of successful highway safety management programs requires accurate accident data, and availability of these data. Unfortunately, in Iran, there is some uncertainty about the accuracy and completeness of these data to be used in a safety management program.The main purpose of this study is to identify and compare highway accident hazard index for a two-lane rural highway in Iran using two different methods. In the first method, traffic and alignment characteristics of the highway were recorded through roadway auditing technique, GPS surveying, and video recording. Hence, cubic spline relationships and smoothing parameters were used to calculate highway alignments characteristics. Then, a Poisson modeling was developed to describe relationships among effective independent parameters leading to accidents. The second method was based on the expert opinions of highway traffic and safety administrators using Analytical Hierarchy Process (AHP) method.
    Results of analysis of the first method indicated that of 20 parameters evaluated, only seven parameters of "Overtaking in Road Sections Turning to Left is Allowed", "Access Alarms", "Access Conditions", Shoulder Width", "Sequence Curves Distance", "Roadside Condition", and "Driver Unexpected Reaction" were significant. The AHP method results show that "Overtaking Maneuvers", "Road Alignments", "Accesses", "Road Consistency", and "Roadsides" parameters had the highest order of ranking, respectively. Elasticity was used to rank the original 20 parameters used in the Poisson modeling. Results showed similar priorities for the five parameters of "Overtaking Maneuvers", "Road Alignments", "Accesses", "Road Consistency", and "Roadsides" in both methods
  9. Keywords:
  10. Hazard Index ; Modeling ; Two-Line Highway ; Rural Road ; Road Safety Inspection Program

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