In Texas, high-occupancy vehicle (HOV) lanes are an integral part of urban mobility. Although an extensive system of permanent HOV lanes is planned for the Dallas–Fort Worth area, the Texas Department of Transportation and Dallas Area Rapid Transit have implemented interim HOV lanes by retrofitting them into existing freeways. Safety is examined for Dallas's buffer-separated concurrent-flow HOV lanes, which were implemented by lane widths being reduced and by the inside shoulder being converted to an HOV lane on I-35 East and I-635. Injury crash data from each corridor were analyzed on the basis of crash rates, frequency trends, and manually reviewing police reports. The analysis considered the impact of design elements, including buffer width, shoulder presence, and lane width. Operationally, the analysis considered the impact of speed differential between the HOV and general purpose lanes. This evaluation resulted in three key findings: (a) both corridors had an increase in crash rates after implementation of the HOV lane, (b) the increase in crashes is primarily focused on the HOV lane and the first adjacent general purpose lane, and (c) the increase in crashes is primarily attributed to the speed differential between the HOV and the general purpose lanes and the reduced HOV cross section. The recommendation, based on these findings, is to provide greater width for the total HOV cross section (inside shoulder + HOV lane + painted buffer) than that provided in the two interim corridors. An absolute minimum of 18 ft between the freeway barrier and the general purpose lanes may mitigate many types of crashes that occur because of the speed differential, with full inside shoulders being the desirable cross section.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Safety Evaluation of Buffer-Separated High-Occupancy Vehicle Lanes in Texas


    Weitere Titelangaben:

    Transportation Research Record


    Beteiligte:


    Erscheinungsdatum :

    2006-01-01




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Safety Evaluation of Buffer-Separated High-Occupancy Vehicle Lanes in Texas

    Cooner, S. A. / Ranft, S. E. / National Research Council (U.S.) | British Library Conference Proceedings | 2006


    Safety Evaluation of Buffer-Separated High-Occupancy Vehicle Lanes in Texas

    Cooner, Scott / Ranft, Stephen | Transportation Research Record | 2006



    Cross-Section Designs for the Safety Performance of Buffer-Separated High-Occupancy Vehicle Lanes

    Jang, K. / Kang, S. / Seo, J. et al. | British Library Online Contents | 2013