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Left-turn phasing selection considering vehicle to vehicle and vehicle to pedestrian conflicts

Journal of Traffic and Transportation Engineering(English Edition) 2023年第1期10卷 58-69页

作者： kakan c.dey Md Tawhidur Rahman Subasish Das Amrit Manova Williams Wadsworth Department of civil and Environmental Engineering West Virginia UniversityMorgantownWV 26506USA AEcOM Technical Services Inc.PhoenixAZ 85020USA Ingram School of Engineering Texas State UniversitySan MarcosTX 78666USA Davenport Engineering CharlotteNC 28273USA

Left-turning vehicle movement at signalized intersections with permissive left-turn phases creates safety concerns due to the higher chance of conflict with opposing-through vehicles and *** this research,a simulation-based study was conducted to evaluate pedestrians’impact on traffic conflicts between left-turning vehicles and opposing-through vehicles(V-V conflicts)as well as traffic conflicts between left-turning vehicles and pedestrians(V-P conflicts)in the permissive left-turn phasing *** with different opposing-through volumes,left-turn volumes,number of opposing-through lanes,and pedestrian volumes were modeled in VISSIM,a traffic *** surrogate safety assessment model(SSAM)was used to estimate the number of V-V and VP *** effect of pedestrian presence on V-V and V-P conflicts was evaluated using simulation scenarios with and without pedestrian *** results revealed that pedestrian presence increased both V-V and V-P *** pedestrian presence increased the total number of traffic conflicts,permissive left-turn phasing processed fewer left-turn vehicles to maintain the same level of intersection safety with pedestrian presence compared to the no-pedestrian *** current left-turn phasing decision guidelines do not consider the impacts of pedestrian presence,this research quantified pedestrian-influenced and pedestrian-involved left-turn traffic conflicts to determine appropriate left-turn signal phasing decisions to ensure safe and efficient crossing of pedestrians and vehicles at signalized *** simulation-based study’s findings can be beneficial in the decision making of left-turn phasing selection as the before-after intersection safety performance analysis by collecting field data often resources intensive.

关键词： V-V conflicts V-P conflicts Left-turn phasing Pedestrian Warrants

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