Integrating Safety in Developing a Variable Speed Limit System

Disaggregate safety studies benefit from the reliable surveillance systems which provide detailed real-time traffic and weather data. This information could help in capturing microlevel influences of the hazardous factors which might lead to a crash. The disaggregate traffic safety models, also called real-time crash risk evaluation models, can be used in monitoring crash hazardousness with the real-time field data fed in. One potential use of real-time crash risk evaluation models is to develop Variable Speed Limits (VSL) as a part of a freeway management system. Models have been developed to predict crash occurrence to proactively improve traffic safety and prevent crash occurrence. In this study, disaggregate real-time crash risk evaluation models have been developed for the total crashes and the feasibility of utilizing a VSL system to improve traffic safety on freeways has been investigated. This research was conducted based on data obtained from a 15-mile mountainous freeway section on I-70 in Colorado. The data contain historical crash data, roadway geometric characteristics, real-time weather data, and real-time traffic data. Real-time weather data were recorded by 6 weather stations installed along the freeway section, while the real-time traffic data were obtained from the Remote Traffic Microwave Sensor (RTMS) radars and Automatic Vechicle Identification (AVI) systems. Different datasets have been formulated from various data sources, and prepared for the multi-level traffic safety studies.

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  • Supplemental Notes:
    • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
  • Corporate Authors:

    University of Central Florida, Orlando

    Center for Advanced Transportation Systems Simulation
    4000 Central Florida Boulevard, P.O. Box 162450
    Orlando, FL  United States  32816-2450

    National Center for Transportation Systems Productivity and Management (NCTSPM)

    Lamar Allen Sustainable Education Building
    788 Atlantic Drive
    Atlanta, GA  United States  30332-0355

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Authors:
    • Abdel-Aty, Mohamed
    • Yu, Rongjie
  • Publication Date: 2014-1


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 107p

Subject/Index Terms

Filing Info

  • Accession Number: 01644656
  • Record Type: Publication
  • Contract Numbers: DTRT12GUTC12
  • Created Date: Aug 29 2017 10:09AM