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Analysis of Dilemma Zone Safety Considering Signal Location  

Ryu, Chang-Nam (도로교통안전관리공단 전북지부 안전조사팀)
Kim, Won-Chul (히로시마대학교 국제협력대학원)
Jang, Tae-Youn (전북대학교 건축도시공학부)
Lim, Sam-Jin (한양대학교 교통공학과)
Publication Information
Journal of Korean Society of Transportation / v.26, no.1, 2008 , pp. 7-14 More about this Journal
Abstract
One of purposes of installing signals at intersections is to protect traffic conflicts and accidents from occurring by means of arranging the right-of-way of travel more clearly. On the other hand, the installation of signals, and especially their location, can also have negative effects on safety. Therefore, the location of signals is of great importance. To secure a high safety level for urban signalized intersection, efforts are required to introduce a comprehensive recommendation or guideline for safety aspects of signal installation that takes local conditions into account. In this context, this reports on a study that analyzed the influence of signal location on the behavior of drivers who approach a signalized intersection in urban area. As a result, the study found out that the traffic signal location strongly affects the braking point of the Dilemma Zone(DZ), and the braking point of the DZ based on driving speed. Also, in terms of design layout, it has been illustrated that there is a close relation between signal location and road safety, especially DZ safety. Finally, this paper proposes a practical recommendation for signal installation related to how to locate the signal in practice for the sake of securing the safety level of signalized intersection.
Keywords
Signal Location; Dilemma Zone; Driver Behavior; Safety Margin; Approaching Speed;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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