In 1977, two years after its initial Notice of Proposed Rule Making in Docket 20509, the Federal Communications Commission (FCC) authorized the establishment of travelers' information stations (TIS) in the Local Government Radio Service, Part 90 of the FCC Rules and Regulations. Stations may be authorized on either 530 kHz or 1610 kHz for the purpose of providing useful noncommerical information to the traveling public by agencies of state and local governments via the AM radios with which most motor vehicles are currently equipped. Agencies of the federal government, such as the U.S. Park Service, have also been authorized by the Interagency Radio Advisory Committee (IRAC) to operate travelers information stations subject to the same rules adopted by the FCC. The background of highway advisory radio (HAR) and some of the considerations that led to the present rules are discussed. The effect on HAR system design of limitations imposed by the rules and by AM receiver characteristics is also discussed. Using field data acquired under a Federal Highway Administration (FHWA) contract, the problems of HAR antenna design within the FCC imposed limits are illustrated.
Highway advisory radio
Autobahn-Verkehrsinformationsfunk (HAR)
IEEE Transactions on Vehicular Technology ; 29 , 2 ; 183-191
1980
9 Seiten, 11 Bilder, 8 Quellen
Article (Journal)
English
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