Q. Can states charge tolls on interstate highways?
The Federal-aid Highway Program, Title 23 of the United States Code (23 U.S.C.), offers States and/or other public entities a variety of opportunities to toll motor vehicles to finance Interstate construction and reconstruction, promote efficiency in the use of highways, reduce traffic congestion and/or improve air quality. http://www.fhwa.dot.gov/ohim/tollpage/history.htm
For more information, please see: http://www.fhwa.dot.gov/ohim/tollpage.htm