SOURCE: Based on data from Bureau of the Census, U.S. Department of Commerce
SOURCE: National Climatic Data Center
SOURCE: National Climatic Data Center
SOURCE: National Climatic Data Center
SOURCE: Based on data from Bureau of the Census, U.S. Department of Commerce
SOURCE: National Oceanic and Atmospheric Administration, Distances Between United States Ports, 1987
SOURCE: National Association of State Park Directors
SOURCE: U.S. Bureau of Economic Analysis
SOURCE: Texas Transportation Institute, 2001
SOURCE: U.S. Federal Highway Administration, Office of Technology
