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Crews are expected to remove falsework along the east side of the SR-55 bridge over MacArthur Boulevard. Falsework is a temporary structure to support the bridge while it is being reconstructed. 

This work will require directional closures of MacArthur under the freeway as well as the northbound and southbound loop on-ramps. More information will be available in future communications.

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Bookmark the closures and detours map for quick access to real-time construction information. Click on the construction icons to view activities and closures.

Do you own a small business? OCTA's Focus on 55 Program supports businesses along the Project corridor during construction. The program offers marketing assistance to increase exposure for businesses and encourages customers to shop local.

Visit octa.net/Focuson55 to view participating businesses and enroll your business today. It's free to participate and registration is easy!

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. Also, the project will add merge lanes between several interchanges and stripe carpool lanes for continuous access, augmenting safety on the freeway by making merging easier. These enhancements are expected to create a better, smoother driving experience for motorists.