CHICAGO AREA EXPRESSWAY SURVEILLANCE AND CONTROL: FINAL REPORT

The Chicago area expressway network features the world's first and largest freeway traffic surveillance and control system. From pioneer experiments with detector/telemetry/computer monitoring of traffic flow, and the development of entrance ramp metering, the real-time system now covers 105 miles (169 km), with 1600 detector locations and 54 controlled ramps. This report describes the surveillance and control system and its basic components, documents the implementation and operational experience, evaluates ramp control effectiveness, assesses costs and benefits, and relates the use of electronic traffic aids to overall urban freeway traffic management efforts. The Chicago area case study illustrates successful progress towards reducing freeway congestion, improving flows, increasing safety, expediting emergency responses, and providing motorist aid and information.

  • Supplemental Notes:
    • Expressway Surveillance Report 27.
  • Corporate Authors:

    Illinois Department of Transportation

    Bureau of Materials and Physical Research
    126 East Ash Street
    Springfield, IL  USA  62704-4766

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Publication Date: 1979-3

Media Info

  • Pagination: 180 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00313180
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-IL-ES-27
  • Files: NTIS, TRIS, USDOT, STATEDOT
  • Created Date: May 7 1980 12:00AM