Transportation Corridor Agencies (TCA) are two joint powers authorities formed by the California State Legislature in 1986 to plan, finance, construct, and operate Orange County's toll roads. TCA consists of two local government agencies:

The toll roads maintained by TCA are financed with tax-exempt bonds on a stand-alone basis—taxpayers are not responsible for repaying any debt if toll revenues fall short.

Some California lawmakers and toll road advocates favor using similar local agencies to build and maintain tollways, especially after the controversy of authorizing a private company to initially run the 91 Express Lanes. Others oppose them, arguing that new toll roads will just facilitate and perpetuate sprawl.

The Transportation Corridor Agency funded studies which argued that the California gnatcatcher was not a distinct species, in order to argue for delisting of the species under the Endangered Species Act of 1973 and enable extension of the State Route 241.

FasTrak is the electronic toll collection system used by the TCA.

The toll roads managed by Transportation Agencies were originally supposed to be free roads by 2033. However, TCA refinanced the debt in 2014, thus extending the agency's authority of the toll roads until 2053.

In 2018, Transportation Corridor Agencies signed a cooperative agreement with the San Bernardino County Transportation Authority to be the processing partner for the San Bernardino County high-occupancy toll lanes.

By 2020, Transportation Corridor Agencies had a budget of 400 million per year.