NDLI: Design speed based reliability index model for roadway safety evaluation

Content Provider	Springer Nature Link
Author	Oh, Heung Un Mun, Sungho
Copyright Year	2012
Abstract	The risk level evaluation for a highway segment is difficult because traffic crashes are characterized by a complex combination of highway alignments, vehicle speed, and speed dispersions. This paper provides a means of evaluating risky expressway segments by combining the design speed, observed speed, and their variations. A reliability index model was introduced for this purpose. The design speed and observed speed were used as the input capacity and demand, respectively, in the reliability index. Highway alignments, observed speed, and crash data from eighteen segments of expressways obtained from road safety audit projects in Korea were used to evaluate the model applicability to observed road conditions. The results imply that reliability indices and associated variables can explain the level of crash statistics. The new reliability index approach can therefore provide easily combined reflections of highway design and driver elements in the evaluation of risky expressway segments.
Starting Page	845
Ending Page	854
Page Count	10
File Format	PDF
ISSN	12267988
Journal	KSCE Journal of Civil Engineering
Volume Number	16
Issue Number	5
e-ISSN	19763808
Language	English
Publisher	Korean Society of Civil Engineers
Publisher Date	2012-06-29
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	reliability index traffic crash operating speed design speed Geotechnical Engineering & Applied Earth Sciences Industrial Pollution Prevention Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Civil and Structural Engineering

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