Creator
- United States. Bureau of Transportation Statistics27
- Stackhouse, Cecil17
- United States. Bureau of the Census. Geography Division6
- Hijmans, Robert J.2
- Environmental Systems Research Institute (Redlands, Calif.)1
- Rawson, Peg1
- Strocko, Ed1
- U.S. Census Bureau. Geography Division1
- United States. Federal Highway Administration1
- United States. Office of the Deputy Under Secretary of Defense (Installations and Environment)1