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http://dx.doi.org/10.7855/IJHE.2012.14.1.095

Analysis of Traffic Accident Characteristics for the Overlap Section of Horizontal and Vertical Alignment  

Park, Min-Soo (한국종합기술 도로공항부)
Chang, Myung-Soon (한양대학교 교통물류공학과)
Publication Information
International Journal of Highway Engineering / v.14, no.1, 2012 , pp. 95-102 More about this Journal
Abstract
This study has been conducted to characterize the relations between the accident rate and the overlap section elements where the horizontal alignment and vertical alignment are overlapped. The researches were performed on Horizontal curve sections of 4-lane highways with 100km/h of design speed and speed limit. Korea Highway Corporation's Geographic Figurative Information System was adopted for geometric organization and Highway Traffic Accident Statistics was used. The results reveal that sections made of a single slope without vertical curve has greater accident rate than those with vertical curve, and that sections with 1 vertical curve are higher in the accident rate than those with over 2 vertical curve. For the sections with 1 vertical curve, SAG sections are higher than CREST sections and for the previous straight section of horizontal curve are higher than curved ones. In particular, when the road surface is wet, the accident rate is closely related with SAG vertical curves or leftward horizontal curved sections. This study will have meanings that it proposes the importance of design of road alignment by taking consideration of 3D synthetic alignment conditions for improvement of the road safety.
Keywords
horizontal alignment; vertical alignment; overlap section of horizontal and vertical alignment; accident rate;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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