EVALUATION OF WARNING AND INFORMATION SYSTEMS. PART I. CHANGEABLE MESSAGE SIGNS

The report evaluates a changeable message sign system in Los Angeles providing warning and information to motorists. 35 bulb matrix signs were installed along 24 directional-miles of freeway. These signs were minicomputer activated via leased telephone lines and displayed operator selected messages. Electronic traffic surveillance provided incident detection, end-of-queue locations and the length of congestion. Field personnel and the Highway Patrol also detected and identified incidents. Areas included in this evaluation are public acceptance, vehicle speeds approaching a queue (closing speed), diversion, lane changes and accidents.

  • Supplemental Notes:
    • Report on the Los Angeles Area Freeway Surveillance and Control Project (LAAFSCP).
  • Corporate Authors:

    California Business and Transportation Agency

    P.O. Box 2304
    Los Angeles, CA  United States  90051

    California Highway Patrol

    777 W. Washington Boulevard
    Los Angeles, CA  United States  90015

    University of California, Los Angeles

    School of Architecture and Urban Planning
    Los Angeles, CA  United States  90024

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Bogdanoff, M A
    • THOMPSON, R P
  • Publication Date: 1976-7

Media Info

  • Pagination: 226 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00154856
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA/CA/RD-75/5 Final Rpt., CADOT-07-3130-1-75-5
  • Files: NTIS, TRIS, USDOT
  • Created Date: Jun 22 1977 12:00AM