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http://dx.doi.org/10.7855/IJHE.2011.13.1.097

Freeway Crash Frequency Model Development Based on the Classification of Geometric Alignment Type  

Kim, Sang-Youp (서울시립대학교 교통공학과)
Choi, Jai-Sung (서울시립대학교 교통공학과)
Lee, Soo-Beom (서울시립대학교 교통공학과)
Kim, Seong-Min (서울시립대학교 교통공학과)
Cho, Won-Bum (한국건설기술연구원 도로연구실)
Kim, Yong-Seok (한국건설기술연구원 도로연구실)
Publication Information
International Journal of Highway Engineering / v.13, no.1, 2011 , pp. 97-105 More about this Journal
Abstract
This paper presents how one can investigate the effects on crash occurrence of freeway geometric design elements including the horizontal, vertical alignment and road environment. At present, the available research results for the most part involve geometric data analysis that are obtained along a relatively long section of freeway, and, because of the long section's diverse geometric conditions, the results tend to miss the specific local geometric impacts on vehicle crashes. In this regard, this research attempts to establish vehicle crash models based on a set of freeway geometric patterns whose crash generating characteristics are identical because they are homogeneous in terms of producing the same vehicle operating speeds, and subsequently their actual relationships are described by providing statistical analysis made in this research. Also each standard is comprised of part of straight, curve and continuous curve. This research has revealed that each type of model has different relation between accident and geometry structure. This research results should be useful for doing more reasonable highway designs and safety audit analysis.
Keywords
classification of geometric alignment type; crash frequency model; poisson model; negative binomial model;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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