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SR-55 (I-405 to I-5) Improvement Project

Construction Updates

OCTA, in cooperation with Caltrans, is improving 4 miles of SR-55 between I-405 and I-5. The project will add one regular lane and one carpool lane in each direction, as well as merge lanes between several interchanges.

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Project Details

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. To address this demand, OCTA and Caltrans are working together to deliver improvements to SR-55 between I-405 and I-5.

roadway
  • Add one regular lane and one carpool lane in each direction between I-405 and I-5
  • Relocate local streets or narrow the width of some surface streets
structure
  • Improve four freeway bridges over MacArthur Boulevard, Dyer Road, Edinger Avenue and a railroad crossing
  • Build one sound wall near the SR-55/I-5 interchange and construct retaining walls throughout the corridora
  • Reconfigure on- and off-ramps
operational
  • Restripe regular lanes
  • Restripe carpool lanes for continuous access, making it easier for motorists to enter and exit the lanes
  • Add new merge lanes on northbound SR-55 between MacArthur Boulevard and Edinger Avenue
  • Install overhead signs and lighting
details
Length

4 miles

Corridor Cities

Irvine, Santa Ana and Tustin

Total estimated cost

$475.1 million

Schedule

August 2022 to 2026

Kenyon Pointe and El Paseo Communities

To learn more about construction activities happening near the Kenyon Pointe and El Paseo communities, as well as neighborhood meetings and events, click here.

Construction Closures & Detours

Closures and detours for the SR-55 Improvement Project

Construction Accomplishments

Social Media Feed

Latest Activity

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weekly construction alert
weekly construction alert
Week of May 20, 2024
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weekly construction alert
Week of May 13, 2024
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weekly construction alert
weekly construction alert
Week of May 6, 2024

Contact the SR-55 Community Outreach Team

If you have questions or would like to request information in another language, please contact the Outreach Team at (888) 371-2555 or email SR55Info@octa.net.

Text "55FWYProject" to (877) 587-3065 to receive text alerts.