Effects of Flaggers & Spotters in Directing Work Zone Traffic for Illinois Freeways & Expressways

The main goal of this study is to assess the effectiveness and essential role of flaggers and spotters in directing work zone traffic for expressways and freeways in Illinois with a posted speed limit greater than 40 mph and consider alternative means of providing this function. The study's findings on the roles and effectiveness of flaggers versus spotters for directing work zone traffic control should guide decision-makers on changing policy to allow an expanded use of work zone spotters to improve work zone safety and mobility performance in future road and bridge construction projects.


    • English


    • Status: Completed
    • Funding: $167066.00
    • Contract Numbers:


    • Sponsor Organizations:

      Illinois Department of Transportation

      2300 S. Dirksen Parkway
      Springfield, IL  United States  62764
    • Performing Organizations:

      University of Illinois, Urbana-Champaign

      1105 Newmark Civil Engineering Lab, 205 North Matthews Avenue
      Urbana, IL  United States  61801
    • Principal Investigators:

      El-Gohary, Nora

      Liu, Liang

      El-Rayes, Khaled

    • Start Date: 20111101
    • Expected Completion Date: 0
    • Actual Completion Date: 20131031
    • Source Data: RiP Project 32489

    Subject/Index Terms

    Filing Info

    • Accession Number: 01480000
    • Record Type: Research project
    • Source Agency: Illinois Department of Transportation
    • Contract Numbers: R27-109
    • Files: RiP, STATEDOT
    • Created Date: Apr 27 2013 1:01AM