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

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:
  Accident Causes Accident Data Accident Rates Accident Severity Expressways Field Studies Flaggers Freeways Literature Reviews Occupational Safety Work Zone Safety Work Zone Traffic Control

  More +
• 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
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:35e469bed644246178f19daa448693e2b4e02d4c56a1cec0d204928abf7f60fa
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26890/dot_26890_DS1.pdf
• File Type:
  [PDF - 2.30 MB ]