Safety performance functions (SPFs) are essential tools to help agencies predict crashes and understand influential factors. Florida Department of Transportation (FDOT) has implemented a context classification system which classifies intersections into eight context categories rather than the three classifications used in the Highway Safety Manual (HSM). Using this system, regional SPFs could be developed for 32 intersection types (unsignalized and signalized 3-leg and 4-leg for each category) rather than the 10 HSM intersection types. In this paper, eight individual intersection group SPFs were developed for the C3R-Suburban Residential and C4-Urban General categories and compared with full SPFs for these categories. These comparisons illustrate the unique and regional insights that agencies can gain by developing these individual SPFs. Poisson, negative binomial, zero-inflated, and boosted regression tree models were developed for each studied group as appropriate, with the best model selected for each group based on model interpretability and five performance measures. Additionally, a linear regression model was built to predict minor roadway traffic volumes for intersections which were missing these volumes. The full C3R and C4 SPFs contained four and six significant variables, respectively, while the individual intersection group SPFs in these categories contained six and nine variables. Factors such as major median, intersection angle, and FDOT District 7 regional variable were absent from the full SPFs. By developing individual intersection group SPFs with regional factors, agencies can better understand the factors and regional differences which affect crashes in their jurisdictions and identify effective treatments.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Regional Perspective of Safety Performance Functions and Their Application to Florida Intersections in Suburban Residential and Urban General Context Classification Categories


    Weitere Titelangaben:

    Transportation Research Record


    Beteiligte:
    Gamaleldin, Ghalia (Autor:in) / Al-Deek, Haitham (Autor:in) / Sandt, Adrian (Autor:in) / McCombs, John (Autor:in) / El-Urfali, Alan (Autor:in)


    Erscheinungsdatum :

    2021-04-04




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Roadway Context Classification Approach for Developing Regional Safety Performance Functions for Florida Intersections

    Gamaleldin, Ghalia / Al-Deek, Haitham / Sandt, Adrian et al. | Transportation Research Record | 2020


    Predicting Pedestrian Safety at Suburban Signalized Intersections

    Otis, S. C. / Machemehl, R. B. / Institute of Transportation Engineers | British Library Conference Proceedings | 1996


    Managing Suburban Intersections Through Sensing

    H. Veeraraghavan / O. Masoud / N. P. Papanikolopulos | NTIS | 2002


    Safety Performance Functions for Signalized Intersections in Large Urban Areas

    Lyon, Craig / Haq, Anwar / Persaud, Bhagwant et al. | Transportation Research Record | 2019


    Safety Impacts of Photo-Red Enforcement at Suburban Signalized Intersections

    Miller, John S. / Khandelwal, Rahul / Garber, Nicholas J. | Transportation Research Record | 2006