Orange County District of California's Department of Transportation, includes information on freeway construction and road closures in Orange County.

General information on Orange County's John Wayne Airport (SNA), including timetables and other useful information

South County Association of Municipalities' (SCAM) plan for the conversion of Newport Harbor from yacht harbor to deep water port.

Local bus agency. Includes schedules, fares, and route information.

Builds and manages toll roads in the county. Includes toll and transponder information, proposed extensions, and discounts.