The FCC allocation of a wide band channel at 900 MHz for an Automatic Vehicle Monitoring (AVM) service presented the opportunity to develop a vehicle locating system that can support 5000 vehicles with high location accuracy information and rapid two-way data message transmissions. The system is configured to have a variable update rate of information dependent on user requirements while providing a moving vehicle location accuracy of 300 feet (95% confidence). The basic system utilizes pulse trilateration with an automatic computer inverse hyperbolic location solution. Test results obtained in the Phase I program performed for the City of Dallas have demonstrated the accuracy and general feasibility of the location technique. A single interrogation locating performance of 270 feet for 95% of the locations and 60 feet for 50% of the locations has been documented. Better than 90% of the randomly distributed vehicle positions were successfully located within the accuracy distribution limits. Moving vehicle plots showing the reported vehicle positions in relation to the traversed roads give a pictorial presentation of the frequency of error vs. magnitude of error of the histogram plots.

  • Supplemental Notes:
    • 27th Annual Conference of IEEE Vehicle Technology Group, Orlando, Florida, March 16-18, 1977.
  • Corporate Authors:

    Institute of Electrical and Electronics Engineers (IEEE)

    3 Park Avenue, 17th Floor
    New York, NY  United States  10016-5997
  • Authors:
    • Riccio, A H
  • Conference:
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: p. 144-152

Subject/Index Terms

Filing Info

  • Accession Number: 00159896
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: 77CH1176-7VT Proceeding
  • Files: TRIS
  • Created Date: Dec 27 1977 12:00AM