The efficient and safe movement of traffic at signalized intersections is the primary objective of any signal-phasing and signal-timing plan. Accommodation of left turns is more critical because of the higher need for balancing operations and safety. The objective of this study was to develop models to estimate the safety effects of the use of left-turn phasing schemes. The models were based on data from 200 intersections in urban areas in Kentucky. For each intersection, approaches with a left-turn lane were isolated and considered with their opposing through approach to examine the left-turn–related crashes. This combination of movements was considered to be one of the most dangerous in intersection safety. Hourly traffic volumes and crash data were used in the modeling approach, along with the geometry of the intersection. The models allowed for the determination of the most effective type of left-turn signalization that was based on the specific characteristics of an intersection approach. The accompanying nomographs provide an improvement over existing methods and warrants and allow for a systematic and quick evaluation of the left-turn phase to be selected. The models used the most common variables that were already known during the design phase, and they could be used to determine whether a permitted or protected-only phase would suit the intersection when safety performance was considered.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Safety-Based Left-Turn Phasing Decisions for Signalized Intersections


    Weitere Titelangaben:

    Transportation Research Record: Journal of the Transportation Research Board


    Beteiligte:


    Erscheinungsdatum :

    01.01.2017




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Guidelines for left-turn phasing at signalized intersections

    Stamatiadis, N. / Agent, K. R. / Swedish National Road and Transport Research Institute (VTI) et al. | British Library Conference Proceedings | 1997


    Impact of Left-Turn Phasing on Older and Younger Drivers at High-Speed Signalized Intersections

    Mueller, K. / Hallmark, S. L. / Wu, H. et al. | British Library Online Contents | 2007



    An Analysis of the Start-up Delay and Safety for Signalized Intersections: Impact of Left-Turn Phasing Sequences

    Shawky, Mohamed / Al-Ghafli, Abdulla / Al-Harthi, Hussain | Springer Verlag | 2016


    Lengths of Left-Turn Lanes at Signalized Intersections

    Kikuchi, Shinya | Online Contents | 1993