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http://dx.doi.org/10.12815/kits.2020.19.4.30

A Study on the Application of PPLT(Protected/Permitted Left-Turn) Considering the Traffic Characteristics of PLT/PPLT  

Nam, Sang-bum (Dept. of Urban Information Eng., Univ. of Anyang)
Kim, Ju-hyun (Dept. of Urban Information Eng., Univ. of Anyang)
Shin, Eon-kyo (Dept. of Urban Information Eng., Univ. of Anyang)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.19, no.4, 2020 , pp. 30-44 More about this Journal
Abstract
The application of PPLT is difficult to analyze and judge only from the effects of the delay time. In this study, the application of PPLT was proposed using not only the delay time of PLT and PPLT due to the change in traffic volume and the number of opposite straight lanes but also the traffic volume of passing a left turn and the number of conflict risks as indicators. According to the analysis, the more left-turn traffic than capacity and the less opposite-straight volume, the greater the PPLT effect. On the other hand, if the left-turn traffic is below capacity, the delay time will be reduced partially, but the overall passing left turn volume will not increase, and the conflict risk will increase. In addition, the conflict risk increases in the third lane or higher. Moreover, the difference of passing left-turn volume between PLT and PPLT showed a pattern similar to the delay time difference, and the PPLT coverage was wider than the difference in delay time and was associated more with the conflict risk numbers. Therefore, it would be reasonable to use passing left-turn traffic primarily, consider the delay time below the left-turn capacity, and consider the conflicting risk numbers simultaneously at or above the opposite straight three lanes.
Keywords
Delay time; Passing left-turn volume; Number of conflict risk; PPLT; PLT;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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