This project evaluated a research project that evaluated the safety effects of right turns followed by U-turns (RTUT) at signalized intersections and at median openings as an alternative to direct left turns (DLT) from driveways or side streets on four lane arterials. Safety of both alternatives was evaluated based on traffic conflict analysis. Nine types of conflicts were utilized for this study. Five of the conflict types were related to RTUT movements, while the rest of them were related to DLR movements. Over 500 hours data were collected at sixteen sites with the help of video recording equipment. Data collection sites were divided into two sets by geometric criteria. At the first set of sites, the drivers had to complete U-turn movement of RTUT at a signalized intersection. On the other hand, at the second set of sites the U-turns were at median openings. At traffic signal sites, DLT movements generated two times more conflicts per hour than RTUT movements.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Safety Evaluation of Right Turns Followed by U-Turns (4 Lane Arterials) as an Alternative to Direct Left Turns, Conflict Analysis


    Contributors:
    J. Lu (author) / F. Pirinccioglu (author) / J. C. Pernia (author)

    Publication date :

    2005


    Size :

    134 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Safety Evaluation of Direct Left Turns Versus Right Turns Followed by U-Turns Using Traffic Conflict Technique

    Lu, J. J. / Dissanayake, S. / American Society of Civil Engineers | British Library Conference Proceedings | 2002




    Left Turns

    Ni, Daiheng | Springer Verlag | 2020


    Tractor Semitrailer Left Turns and Lane Changes

    White, Kirsten / Merala, Raymond | SAE Technical Papers | 2010