Toll roads constitute 8.2% of U.S. limited-access highway lane-miles (25.5 thousand ln-mi out of 312 thousand). That relatively small fraction includes some of the highest-volume major highways, such as Florida’s Turnpike, the Indiana Toll Road, Illinois Tollway, New Jersey Turnpike, New York Thruway, Ohio Turnpike, and Pennsylvania Turnpike. Adding HOT lanes and express toll lanes brings the total to 27.4 thousand ln-mi. Most of these toll facilities are owned and operated by public-sector toll agencies, but a fraction of them have been financed and are operated via long-term P3 concessions.