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1
Variable message signing for traffic surveillance and control : a state of the art report
Washington : Springfield, Va. : Dept. of Transportation, Federal Highway Administration, Office of Research and Development ; For sale by the National Technical Information Service, 1977Format: Government Document Book
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2
Variable message signing for traffic surveillance and control : a state of the art report
Washington : Springfield, Va. : Dept. of Transportation, Federal Highway Administration ; available through the National Technical Information Service, 1977Format: Book
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3
Highway advisory radio operational site survey and broadcast equipment guide
Washington, D.C. : Springfield, Va. : Federal Highway Administration, Offices of Research & Development, Traffic Systems Division ; for sale by the National Technical Information Service, 1979Format: Book
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4
Highway advisory radio operational site survey and broadcast equipment guide
Washington : Springfield, Va. : Federal Highway Administration, [Office of Research], Traffic Systems Division ; For sale by the National Technical Information Service, 1979Format: Government Document Book
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5
A status report on vehicle detectors
Washington : Springfield, Va. : Dept. of Transportation, Federal Highway Administration, Office of Research and Development ; For sale by the National Technical Information Service, 1976Format: Government Document Book