Detector occupancy is commonly used to measure traffic signal performance. Despite improvements in controller computational power, there have been few innovations in occupancy-based performance measures and little integration with other data. This paper introduces and demonstrates the use of graphical performance measures based on detector occupancy ratios to verify potential split failures and other signal timing shortcomings reported to practitioners by the public. The proposed performance measures combine detector occupancy during the green phase, detector occupancy during the first 5 s of the red phase, and phase termination cause (gap out or force-off). They are summarized by time of day to indicate whether the phase is undersaturated, nearly saturated, or oversaturated. The graphical performance measures and related quantitative summaries provide a first-level screening and triaging tool to help practitioners assess user concerns about whether sufficient green times are being provided to avoid split failures. They can also provide outcome-based feedback to staff after split adjustments have been made to determine whether operation improved or worsened. The paper demonstrates how the information was used to make an operational decision to reallocate green time that reduced the number of oversaturated splits on minor movements from 304 to 222 during a Thursday 0900 to 1500 timing plan and from 240 to 180 during a Friday 0900 to 1500 timing plan.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Graphical Performance Measures for Practitioners to Triage Split Failure Trouble Calls


    Weitere Titelangaben:

    Transportation Research Record


    Beteiligte:


    Erscheinungsdatum :

    2014-01-01




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Predict trouble Avoid trouble

    Henry Canaday | Online Contents | 2015


    Triage in der Notaufnahme

    Hilt, H. | British Library Online Contents | 2013


    Le triage assure son avenir

    Chessum, Régi | IuD Bahn | 1996


    AUTOMATED WORK TICKETING AND TRIAGE

    CHEN YI-YU / ATKINS ELISHA | Europäisches Patentamt | 2023

    Freier Zugriff

    Le triage automatise de Woippy

    Hilaire, R. / Jourdan, R. / Quonten, R. | Tema Archiv | 1978