364 resultados para Highway-railroad grade crossings
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"January 15, 1996."
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Bibliography: p. [20]
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Federal Railroad Administration, Office of Research and Development, Washington, D.C.
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Transportation Department, Joint Program Office for Intelligent Transportation Systems, Washington, D.C.
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On verso: Michigan Central Railroad grade separation in foreground looking northwest beyond end of expressway. Altitude - 2500 ft.
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Mode of access: Internet.
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Mode of access: Internet.
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Cover title.
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"March 1987"--P. i.
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Mode of access: Internet.
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Mode of access: Internet.
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Other editions have been published by the American school of correspondence, Chicago.
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FRA co-lead agency
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Federal Highway Administration, Washington, D.C.
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Transportation Department, Office of University Research, Washington, D.C.