State Route 55 (SR 55) is an 18-mile (30-km) long north–south state highway that passes through suburban Orange County in the U.S. state of California. The portion of the route built to freeway standards is known as the Costa Mesa Freeway (formerly the Newport Freeway).

OCTA, in cooperation with Caltrans, is improving 4 miles of SR-55 between I-405 and I-5. The project will improve traffic flow and reduce travel time by adding one regular lane and one carpool lane in each direction.

SR-55 is a vital north-south freeway that links central Orange County and beyond to the coastal region. More than 260,000 vehicles use this stretch of SR-55 every day, and that number is expected to grow to nearly 275,000 vehicles by 2040.

The State Route 55 (SR-55) Multi-Asset Project has combined a multi-asset project and a safety project. The roadway improvement includes pavement rehabilitation; improved drainage, lighting and conduits; bridge rail rehabilitation; landscape; Treatment BMP; solar system technology; and overhead sign panels and overhead sign structures.

The Costa Mesa Freeway (SR-55) is one of the most heavily congested freeways in Southern California, with more than 260,000 vehicles traveling on it every day. By 2040, that volume is expected to grow to more than 275,000 vehicles per day. SR-55 is a vital link to major freeway systems in Orange County, and the

The Costa Mesa (SR-55) Freeway is one of the most heavily congested freeways in Southern California, and future demand is only expected to increase congestion. This project proposes to improve mobility, help with traffic flow, and improve traffic operations.

2022年8月2日 · SR-55 is a vital north-south freeway that links central Orange County and beyond to the coastal region. More than 260,000 vehicles use that stretch of SR-55 every day, and that number is expected to grow to nearly 275,000 vehicles by 2040.

The California Department of Transportation (Caltrans) District 12, in cooperation with the Orange County Transportation Authority (OCTA), proposes to widen Interstate 5 (I-5) between Interstate 405 (I-405) and State Route 55 (SR-55. the project limits on I-5 extend from approximately 0.4 mile (mi) north of the I-5/I-405 Interchange (Post Mile ...

Orange County Transportation Authority (OCTA) is proposing to improve freight access and throughput on the State Route 55 (SR-55) from Interstate 405 (I-405) to Interstate 5 (I-5) to enhance mobility for the traveling public.

2023年12月4日 · The $475.1 million project adds one regular lane and one carpool lane in each direction of SR-55 between I-405 and I-5, improving mobility and reducing congestion for motorists. Completion is expected in 2026.