TRAFFIC SURVEILLANCE AND MEANS OF COMMUNICATING WITH DRIVERS INTERIM REPORT

THE OPERATIONAL CHARACTERISTICS OF FREEWAYS WERE STUDIED TO DETERMINE A METHOD OF COMMUNICATING TRAFFIC SURVEILLANCE INFORMATION TO THE DRIVERS. THE RECOMMENDED SPACING OF DETECTION DEVICES TO MEASURE SPEED, VOLUME AND/OR OCCUPANCY DATA WAS DEVELOPED TO COLLECT THE REQUIRED INFORMATION FOR DETERMINING IMPENDING TRAFFIC CONGESTION. THIS METHOD ALLOWS PREDICTION OF TRAFFIC CONGESTION ABOUT THREE MINUTES IN ADVANCE OF ITS ACTUAL DEVELOPMENT. APPLICABILITY OF MATHEMATICAL MODELS TO REAL LIFE SITUATIONS WAS TESTED ON THE EISENHOWER EXPRESSWAY IN CHICAGO AND THE JOHN LODGE EXPRESSWAY IN DETROIT. A CONTROL DEVICE WAS DEVELOPED TO COMMUNICATE FREEWAY RAMP OPERATING CONDITIONS /FREE FLOW, METERING OR CLOSURE/ ON THE THREE NEAREST ENTRANCE RAMPS IN EACH DIRECTION. THIS INFORMATION WOULD ALLOW THE DRIVER TO CHOOSE AN ALTERNATE ROUTE. DRIVER ACCEPTANCE WAS TESTED. DESIGN CRITERIA FOR THE RAMP ACCESS ADVISORY SIGNAL WAS ESTABLISHED AND TESTED. THE OPERATION OF THE AIRBORNE OBSERVER IN TRAFFIC CONTROL WAS ALSO INVESTIGATED. A GENERAL DESCRIPTION OF AIR SURVEILLANCE OPERATIONS AND ITS EQUIPMENT AND COST ARE INCLUDED. COMMUNICATIONS WERE MADE TO MOTORIST THROUGH COMMERCIAL RADIO OF ALTERNATE ROUTES RECOMMENDATIONS WHEN INCIDENTS PRODUCING UNEXPECTED CONGESTION OCCURRED. ATTEMPTS WERE MADE TO MEASURE ACTUAL TIME SAVED BY DRIVERS WHO RESPONDED TO THIS INFORMATION.

Media Info

  • Pagination: 28p
  • Serial:
    • NCHRP Report
    • Issue Number: 9
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 00224779
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jul 1 1994 12:00AM