California State Route 55, also known as the Costa Mesa Freeway, is a north-south highway located in Orange County, California. It spans approximately 16 miles, connecting the cities of Santa Ana and Costa Mesa. The route primarily serves as a vital link for commuters traveling between the inland areas and the coastal regions. The freeway begins at the junction with Interstate 5 in Santa Ana and ends at Pacific Coast Highway in Costa Mesa. It features several interchanges that facilitate access to local neighborhoods, shopping centers, and major attractions, making it an essential roadway for both residents and visitors in the area.