RECEIVERS FOR THE PROPOSED CARFAX TRAFFIC INFORMATION SERVICE

The paper describes the operation of prototype receivers for the proposed BBC carfax traffic information service. This service entails a dedicated network of medium-wave transmitters all sharing the same frequency, disseminating local traffic information in well-defined service areas surrounding each transmitter. The well-defined forms of the service areas are achieved by the use of special receiver-activating fm coded signals preceding each "traffic" transmission, together with signals from the surrounding transmitters. Receivers can be arranged to interrupt normal in-car listening for the reception of a traffic information announcement. The paper describes how such receivers are simple to operate and are potentially low in cost. (a) (TRRL)

• Supplemental Notes:
  • Paper presented at the IERE Conference on Radio Receivers and Associated Systems, 1978.
• Corporate Authors:

  Institution of Electronic and Radio Engineers

  9 Bedford Square
  London WC2B 3RG,   England 
• Authors:
  • Bailey, M E
• Conference:
  • Paper presented at the IERE Conference on Radio Receivers and Associated Systems, 1978.
• Publication Date: 1978

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 401-412

Subject/Index Terms

• TRT Terms: Automatic control; Automation; Communication systems; Communications; Conferences; Drivers; Motor vehicles; Prototypes; Radio; Radio transmitters; Traffic; Transmission; Warning systems
• Old TRIS Terms: Radio transmission
• ITRD Terms: 3882: Automatic; 9098: Communication; 8525: Conference; 1772: Driver; 9109: Prototype; 6947: Radio; 6956: Transmitter; 9113: Warning
• Subject Areas: Bridges and other structures; Highways; Operations and Traffic Management; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00310050
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jun 26 1980 12:00AM