955 resultados para Highway-railroad grade crossings


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National Highway Safety Bureau, Washington, D.C.

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National Highway Safety Bureau, Washington, D.C.

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National Highway Safety Bureau, Washington, D.C.

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"DOT-VNTSC-FHWA-94-16."

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Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

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Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

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Mode of access: Internet.

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Mode of access: Internet.

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Federal Highway Administration, Washington, D.C.

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Federal Highway Administration, Washington, D.C.

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Pennsylvania Department of Transportation, Harrisburg

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Connecticut Department of Transportation, Bureau of Planning and Research, Wethersfield

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National Highway Traffic Safety Administration, Washington, D.C.