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http://dx.doi.org/10.12815/kits.2019.18.3.46

Evaluating the Safety Effects of Dynamic Message in a Work Zone: A Case Study  

Moon, Jae-Pil (Korea Institute of Civil Engineering and Building Tech.)
Lee, Suk-Ki (Korea Institute of Civil Engineering and Building Tech.)
Cho, Jung-Ho (Seoul University & LEDO Co., Ltd.)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.18, no.3, 2019 , pp. 46-57 More about this Journal
Abstract
Generally speeding appeared to be the most contributing factor of fatalities occurred in work zones, and highway agencies in South Korea have concerned of the safety of workers and drivers in the poor circumstances. In this study, a portable variable message signs (PVMS) system as an alternative of control speeding in work zones was implemented. This study evaluated the safety effectiveness of the PVMS based on speeds and the compliance with the speed limit. Linear regression and logistic regression models were adopted to quantify the safety effect of the PVMS between the 'before' and 'after'. The results showed that most of points had statistically significant speeds reduction experience after PVMS installation. Also, the percentage of vehicle exceeding the speed limit by 10 km/h or more was decreased significantly between 50 and 80% in the 'after' periods compared to the 'before' periods. Therefore, the PVMS would be contributed to benefit safety in work zones which there is a difference in design speed of the adjacent normal section.
Keywords
Work zone; Variable message sign; Safety; Speed;
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