AUTOMATIC VEHICLE LOCATION -- DALLAS TEST RESULTS

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:
  • Institute of Electrical and Electronics Engrs Proc
• Publication Date: 1977

Media Info

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

Subject/Index Terms

• TRT Terms: Applications; Automatic vehicle location; Automatic vehicle monitoring; Communication; Computer programs; Error analysis; Errors; Frequency distributions; Governments; Histograms; Information processing; Mathematical methods; Mobile radio
• Geographic Terms: Dallas (Texas)
• Old TRIS Terms: Governmental applications; Pulse methods; Pulse trilateration; Radio systems (Mobile); Trilateration; Two way communication; Vehicle transponders
• Subject Areas: Highways; Operations and Traffic Management; Research;

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