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Update: Nightly Closures of

MacArthur On-Ramp to Southbound SR-55

Extended Through January 2024

WHAT:

Crews are constructing a retaining wall adjacent to the on-ramp from MacArthur Boulevard to southbound SR-55. This work requires installing temporary shoring and removing the existing retaining wall.

Crews are closing the MacArthur on-ramp to SB SR-55 to safely access the work area.

WHEN:

The on-ramp will continue to be closed weeknights from 9 p.m. to 5 a.m. through January 2024.

Click to enlarge detour map.

Happy New Year!

The SR-55 Improvement Project team wishes you a Happy New Year!

In observance of the holiday, there will be no closures scheduled from Friday, Dec. 29 to Monday, Jan. 1. Construction activities will resume Tuesday, Jan. 2.

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

This week's Focus on 55 business spotlight is Arndt Dental, a private dental office that offers personalized care to each patient. Based in the City of Tustin, they are dedicated to promoting overall wellbeing and exceptional oral health.

12805 Newport Ave., Tustin, CA 92780

714-544-5070

arndtdental@att.net

youngarndtdental.com

To learn more about OCTA's Focus on 55 Program, including official rules and eligibility, visit octa.net/Focuson55 or click here to enroll your business today.

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.