55 Freeway Project

55 Freeway Project Caltrans and OCTA will add one regular lane and one carpool lane in each direction of SR-55.

SR-55 is one of the most heavily congested freeways in Southern California. The average daily traffic is 261,700 vehicles per day and traffic is expected to increase with future demand. SR-55 is a vital corridor connecting Orange County to Riverside and San Bernardino counties and is a major route for accessing key business centers, John Wayne Airport, major shopping destinations and beach cities.

Crews are expected to perform finishing work at the MacArthur Boulevard bridge, as well as remove concrete barriers on t...
09/05/2026

Crews are expected to perform finishing work at the MacArthur Boulevard bridge, as well as remove concrete barriers on the street, which will require the following closures:

🔸 Eastbound and westbound MacArthur Boulevard underneath the freeway from 9 p.m. to 5 a.m. nightly, Tuesday, Sept. 8 through Thursday, Sept. 10
🔸 Eastbound MacArthur Boulevard from 9 p.m. to 5 a.m. on Friday, Sept. 11 (into Saturday morning)

This work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

City of Irvine City Hall City of Tustin - Municipal Government City of Santa Ana - Municipal Government

In observance of Labor Day, there will be no nighttime closures from Friday, Sept. 4 through Monday, Sept. 7. Constructi...
09/04/2026

In observance of Labor Day, there will be no nighttime closures from Friday, Sept. 4 through Monday, Sept. 7. Construction activities will resume on Tuesday, Sept. 8.

Crews are expected to perform paving work at the retaining wall along the northbound McFadden Avenue off-ramp. This work...
09/01/2026

Crews are expected to perform paving work at the retaining wall along the northbound McFadden Avenue off-ramp. This work will require closing the northbound McFadden Avenue off-ramp, Edinger Avenue on-ramp, and two outside lanes between these ramps from 9 p.m. to 5 a.m. nightly, Tuesday, Sept. 1 to Thursday, Sept. 3.

City of Tustin - Municipal Government City of Irvine City Hall City of Santa Ana - Municipal Government

⚠️ Crews are expected to perform paving work along southbound SR-55, which will require closing the southbound I-5 to so...
08/28/2026

⚠️ Crews are expected to perform paving work along southbound SR-55, which will require closing the southbound I-5 to southbound SR-55 connector and southbound McFadden Avenue off-ramp from 9 p.m. to 5 a.m. on Friday, Aug. 28 (into Saturday morning).

City of Irvine City Hall City of Santa Ana - Municipal Government City of Tustin - Municipal Government

Crews are expected to restripe eastbound (EB) Dyer Road underneath the freeway to reopen the street to three lanes in ea...
08/27/2026

Crews are expected to restripe eastbound (EB) Dyer Road underneath the freeway to reopen the street to three lanes in each direction. Once striping work at Dyer is complete, crews will restripe MacArthur Boulevard to two lanes in each direction, to shift traffic towards the outside and allow crews to safely perform work in the median.

The following closures are needed to facilitate this work:

🔶 EB MacArthur from 9 p.m. to 5 a.m. nightly, Wednesday, Aug. 26 and Thursday, Aug. 27 (into Friday morning)
🔶 EB Dyer from 9 p.m., Thursday, Aug. 27 to 5 a.m., Friday, Aug. 28

City of Santa Ana - Municipal Government City of Tustin - Municipal Government City of Irvine City Hall

Be in the know before you go! 📍 Check out our Closures and Detours Google Map to stay informed about this week’s closure...
08/26/2026

Be in the know before you go! 📍 Check out our Closures and Detours Google Map to stay informed about this week’s closures.

octa.net/55Construction

The last day of the OC Fair is Sunday, August 16! 🎡🎟️ Enjoy food, carnival rides, live entertainment, exhibits, and more...
08/15/2026

The last day of the OC Fair is Sunday, August 16! 🎡🎟️ Enjoy food, carnival rides, live entertainment, exhibits, and more before the fair wraps up.

Advance tickets are required. Visit OCFair.com for event details and information.

Crews are expected to perform paving work along southbound SR-55, which will require closing the southbound I-5 to south...
08/13/2026

Crews are expected to perform paving work along southbound SR-55, which will require closing the southbound I-5 to southbound SR-55 connector and southbound McFadden Avenue off-ramp from 9 p.m. to 5 a.m. nightly, Thursday, Aug. 13 to Friday, Aug. 14.

City of Irvine City Hall City of Santa Ana - Municipal Government City of Tustin - Municipal Government

Crews are expected to stripe eastbound (EB) Dyer Road underneath the freeway to reopen the street to three lanes, which ...
08/13/2026

Crews are expected to stripe eastbound (EB) Dyer Road underneath the freeway to reopen the street to three lanes, which will require closing EB Dyer from 9 p.m., Friday, Aug. 14 to 5 a.m., Saturday, Aug. 15.

Once striping work at Dyer is complete, crews will place concrete barriers along eastbound and westbound MacArthur Boulevard on the east side of the bridge to shift traffic towards the outside and reduce the street to two lanes in each direction. This will allow crews to safely perform work in the median.

City of Santa Ana - Municipal Government City of Tustin - Municipal Government City of Irvine City Hall

Address

600 S. Main Street
Orange, CA
92868

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm
Saturday 10am - 5pm
Sunday 11am - 5pm

Telephone

+18883712555

Website

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