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1. Hazardous Materials Routes: United States, 2012

2012. Miller, David, John A. Volpe National Transportation Systems Center (U.S.), and United States. Bureau of Transportation Statistics. This polyline shapefile depicts FMCSA Hazardous Material Routes that were developed using the 2004 First Edition Topologically Integrated Geographi... United States. Bureau of Transportation Statistics.

2. Ports: United States and Territories, 2012

2012. United States. Bureau of Transportation Statistics and Institute for Water Resources (U.S.). Navigation Data Center. This point shapefile depicts physical information on commercial facilities at the principal United States coastal, Great Lakes and inland ports. Th... United States. Bureau of Transportation Statistics.