The express lanes are a four-lane, 10-mile toll road in the median of the Riverside Freeway (SR-91) between the Orange/Riverside County line and the Costa Mesa Freeway (SR-55). OCTA purchased the 91 Express Lanes without taxpayer money and removed a "non-compete" clause that prevented safety and traffic flow improvements along the stretch of tollway. In July 2003, OCTA adopted a toll policy for the 91 Express Lanes based on the concept of congestion management pricing, which is designed to optimize traffic flow at free-flow speeds. The policy calls for dropping and raising tolls based on traffic demand. Traffic volumes are monitored daily and adjusted quarterly. The other tollways in Orange County are governed by the Transportation Corridor Agencies. Environmental mitigation An restoration project of the Bee Flat Canyon site was done by Irvine Ranch Conservancy in partnership with OCTA as part of meeting the agency’s mitigation requirements to offset the damage it does to the environment. The project was deemed a success in 2020 by the California Department of Fish and Wildlife and U.S. Fish and Wildlife Service. See also List of OCTA Routes Discontinued OCTA bus routes References External links OCTA Next Ride Trip Planner Also See OC Bus OC Streetcar Metrolink Public transportation in Orange County, California Government in Orange County, California Intermodal transportation authorities in California Transit agencies in California Transportation in Orange County, California Bus transportation in California Passenger rail transportation in California Toll road authorities of the United States Transit authorities with natural gas buses Transportation in Anaheim, California Transportation in Fullerton, California Transportation in Orange, California Transportation in Santa Ana, California Government agencies established in 1991 1991 establishments in California