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United States. Federal Highway Administration.
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Consequences of mandatory stops at railroad-highway crossings. United States. Federal Highway
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United States. Federal Highway Administration. Offices of Research, Development, and Technology.
Format:
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United States. Federal Highway Administration. Offices of Research, Development, and Technology.
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United States. Federal Highway Administration. Office of Safety and Traffic Operations Research and Development.
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United States. Federal Highway Administration. Office of Safety and Traffic Operations Research and
by
Perkins, D.
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Alıntı:
Traffic signs and signals -- United States -- Maintenance and repair -- Handbooks, manuals, etc.
by
Zegeer, Charles V.
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Alıntı:
United States. Federal Highway Administration.
by
Bowman, Brian L.
Format:
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Alıntı:
Truck accidents -- United States -- Statistics.
by
Bowman, Brian L.
Format:
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Alıntı:
United States. Federal Highway Administration. Office of Safety and Traffic Operations Research and
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