SR 55, also known as the Costa Mesa Freeway, is a major highway in Southern California. It runs approximately 17 miles, connecting the cities of Santa Ana and Costa Mesa. The freeway serves as a vital route for commuters and travelers in the region, facilitating access to various neighborhoods and commercial areas. The highway features multiple interchanges with other significant roads, including I-5 and I-405. SR 55 is known for its role in easing traffic congestion and providing a direct path to popular destinations, such as South Coast Plaza and Orange County Fairgrounds.