Number of toll bridges by state. Definition, graph and map.
SOURCE
U.S. Department of Transportation, Federal Highway Administration, Toll Facilities in the United States: Bridges-Roads-Tunnels-Ferries, Washington, DC: July 2003
DEFINITION: Total number of toll bridges by state.
SOURCE: U.S. Department of Transportation, Federal Highway Administration, Toll Facilities in the United States: Bridges-Roads-Tunnels-Ferries, Washington, DC: July 2003 via StateMaster