The report describes the analysis and preliminary design of a short-range motorist aid transceiver which would function as a wireless communication link between an automobile and a roadside callbox. Digital signalling would be the primary operating mode, with two-way simplex voice communication as a backup. Our analysis showed that a hand-held 5 milliwatt transceiver operating at approximately 450 MHz could provide the desired one-mile communication range. Circuit technologies such as inductorless injection-locked oscillators, surface acoustic wave filters and stripline filters were breadboarded and tested to show their potential for low-cost production. A CMOS logic demonstrator was designed and constructed; it provided eight selectable digital message, automatic transmitter identification, audible and visual acknowledgement, and dispatcher control of voice operation. Preliminary cost estimates showed that the transceiver could be produced in large quantities at a unit cost within the 60-dollar design goal. However, development work was discontinued because of the questionable cost effectiveness of the short-range transceiver concept. Emphasis during the remainder of the program was shifted to an analysis of the Citizens Radio Service for motorist aid and emergencies.

  • Supplemental Notes:
    • See also volume 2, PB-264 432.
  • Corporate Authors:

    Honeywell, Incorporated

    Systems Research Center, 2600 Ridgeway Parkway
    Minneapolis, MN  United States  55413

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Koehler, L E
    • Berg, R O
    • Gardner, J A
    • Summers, R
  • Publication Date: 1976-3

Media Info

  • Pagination: 131 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00151780
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-RD-76-122 Final Rpt., 76-SRC/7, FCP 32L3-012
  • Contract Numbers: DOT-FH-11-8483
  • Files: NTIS, TRIS, USDOT
  • Created Date: Apr 27 1977 12:00AM