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http://dx.doi.org/10.7470/jkst.2016.34.6.535

A Study on the Crash Severity of Expressway Work Zones Using Decision Tree  

PARK, Yong Woo (Department of Transportation Engineering, Keimyung University)
BACK, Sehum (Department of Transportation Engineering, Keimyung University)
PARK, Shin Hyoung (Department of Transportation Engineering, Keimyung University)
KWON, Oh Hoon (Department of Transportation Engineering, Keimyung University)
Publication Information
Journal of Korean Society of Transportation / v.34, no.6, 2016 , pp. 535-547 More about this Journal
Abstract
This study aims to identify factors that affect the degree of injury severity sustained in traffic crashes on work zone of Korean expressways. To this end, decision tree method was applied to identify influential factors on injury severity and compare characteristics of those factors between work zone and non-work zone. The results from the comparison show that the risk of severity was low when traffic volume and heavy vehicle ratio are high because the factors lower the overall section speed. On the other hand, when the traffic volume and the heavy vehicle ratio are low, the section speed increased and the tendency for high injury severity was confirmed. These findings are expected to help transportation planners and engineers understand which risk factors contribute more to severe injury in the work zones such that they can effectively prepare and implement safety countermeasures.
Keywords
crash severity; data mining; decision tree; expressway; work zone;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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