Operational system and equipment were designed that use highway communicator receivers for communications link from side of highway to moving automobile; special VLF receiver is designed to operate with trigger transmitter so that messages are received in one direction of traffic flow only; opposing traffic flow does not receive message.
Highway communications (HY-COM System)
Am Assn State Highway Officials -- Committee Proc
Proceedings of the American association of State Highway Officials -- Conference on Improved Highway Engineering Productivity ; 1965 ; United States , Boston, MA Communication systems
1965
14 pages
Conference paper
English
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New concept in highway communications
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