2013. Rawson, Peg and United States. Bureau of Transportation Statistics. This polygon shapefile contains United States congressional district boundaries for 2013-2015. Congressional Districts are the 435 areas from which... United States. Bureau of Transportation Statistics.
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2013. Strocko, Ed and United States. Bureau of Transportation Statistics. This polygon shapefile contains United States freight analysis framework (FAF) regions. FAF domestic region level datasets and products provide inf... United States. Bureau of Transportation Statistics.