364 resultados para Highway-railroad grade crossings


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Transportation Systems Center, Cambridge, Mass.

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Federal Railroad Administration, Office of Safety, Washington, D.C.

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Texas Department of Transportation, Austin

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Federal Railroad Administration, Office of Policy and Program Development, Washington, D.C.

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Federal Railroad Administration, Office of Policy and Program Development, Washington, D.C.

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Federal Railroad Administration, Office of Research and Development, Washington, D.C.

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Federal Highway Administration, Office of Research and Development, Washington, D.C.

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Federal Highway Administration, Offices of Research and Development, Washington, D.C.

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"Final report July 1998 through July 2000"--Technical report documentation page.

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Federal Highway Administration, Office of Research, Washington, D.C.

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Federal Highway Administration, Office of Research, Washington, D.C.