Development of Highway Safety Policies by Discriminating Freeway Curve Alignment Features
In the Republic of Korea, severe crashes with injuries and fatalities have most frequently occurred in freeway sections with combinations of horizontal and vertical curves. To address this issue related to geometric complexness, this study quantitatively verified the adequacy of Korean highway safety policy and identified supplemental strategies required for the freeway sections with horizontal and vertical curve combinations. Based on in-depth road geometric data, this study combined K-means clustering with binomial logit regression to identify the effects of contributing factors on cluster-based crash severity levels. Resultantly, six cluster-based crash severity estimation models were produced. Single vehicle to roadside protective facility and multivehicle crash types were significant to decrease the likelihood of injury crashes for both full-and three cluster-based regression models. Compared with full data model, driver’s age, action, crash occurrence time, and traffic management related factors were significantly identified in only single cluster. The resultant findings show that multidirectional highway safety policies are further required for the current Korean highway safety policy associated with curve alignment features. This study will assist in researchers and field practitioners’ decision-making for future cost-effective highway safety policies provision related to freeway sections with geometric complexness.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/12267988
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Supplemental Notes:
- © Korean Society of Civil Engineers and Springer-Verlag Berlin Heidelberg 2018.
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Authors:
- Jung, Soyoung
- Wang, Kai
- Oh, Cheol
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0000-0002-2188-7291
- Chang, Jaenam
- Publication Date: 2018-4
Language
- English
Media Info
- Media Type: Digital/other
- Features: References; Tables;
- Pagination: pp 1418-1426
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Serial:
- KSCE Journal of Civil Engineering
- Volume: 22
- Issue Number: 4
- Publisher: Korean Society of Civil Engineers
- ISSN: 1226-7988
- EISSN: 1976-3808
- Serial URL: http://link.springer.com/journal/12205
Subject/Index Terms
- TRT Terms: Cluster analysis; Crash causes; Crash injuries; Crash severity; Freeways; Highway curves; Highway safety; Logits; Traffic crashes; Transportation policy
- Geographic Terms: Korea
- Subject Areas: Highways; Policy; Safety and Human Factors;
Filing Info
- Accession Number: 01673341
- Record Type: Publication
- Files: TRIS
- Created Date: Jun 25 2018 1:49PM