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Effect of flaggers and spotters in directing work zone traffic for Illinois expressways and freeways.

File Language:
English


Details

  • Creators:
    El-Rayes, Khaled ; Liu, Liang ; El-Gohary, Nora ; Abdelmohsen, Ahmed
  • Corporate Creators:
    University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering
  • Corporate Contributors:
    United States. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA-ICT-14-001
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Illinois
  • Corporate Publisher:
    Illinois. Dept. of Transportation. Bureau of Materials and Physical Research
  • Abstract:
    This research project focused on assessing the effectiveness and essential role of flaggers and spotters in ; directing traffic for expressway and freeway work zones in Illinois with a posted speed limit greater than 40 mph. ; The objectives of this project were to (1) conduct a comprehensive literature review to study the latest standards ; and research on the use of flaggers and spotters to direct work zone traffic on expressways and freeways; (2) ; perform site visits and field studies to evaluate flagger practices currently used in work zones in Illinois; (3) collect ; and fuse the latest data on work zone crashes in Illinois during a 14-year period from 1996 to 2009 from all ; available sources; (4) analyze the gathered data to study the frequency and severity of traffic-related work zone ; crashes in Illinois highways, and investigate the probable causes and contributing factors of these work zone ; crashes; (5) investigate the feasibility and effectiveness of work zone safety measures that can be used to ; supplement or replace the use of flaggers and/or spotters, such as intrusion alarm systems, portable changeable ; message signs, and portable speed monitoring displays; (6) conduct an online survey of resident engineers and ; construction personnel in the Illinois Department of Transportation (IDOT) and other state DOTs to gather their ; feedback on the essential roles and effectiveness of flaggers and spotters in directing work zone traffic for ; expressways and freeways; (7) identify the effectiveness and risks of using spotters and/or flaggers in work ; zones with a posted speed limit greater than 40 mph on Illinois expressways and freeways, and identify effective ; work zone safety measures that can be used to supplement or replace flaggers in these works zones; and (8) ; develop recommendations on the use of flaggers, spotters, and other safety measures in work zones with a ; posted speed limit greater than 40 mph on Illinois expressways and freeways. These recommendations can be ; used by IDOT to update and/or expand related IDOT policies, specifications, and standards in order to improve ; work zone safety and mobility.
  • Format:
    PDF
  • Funding:
    ICT-14-001 ; UILU-ENG-2014-2001
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/26890/dot_26890_DS1.pdf
  • File Type:
    Filetype[PDF - 2.30 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:35e469bed644246178f19daa448693e2b4e02d4c56a1cec0d204928abf7f60fa
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File Language:
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