55 Freeway Project

Paving along the outside shoulder of both directions on SR-55 between I-405 and I-5 is underway and expected to be completed soon as crews prepare to shift traffic towards the outside to demolish and reconstruct the center median in late 2026. Be sure to follow on Instagram, X, and Facebook for the latest updates!

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

In mid-October, crews are expected to reconstruct the southbound Dyer Road loop off-ramp, which will require an extended closure of the ramp. Additional information will be provided in future communications.

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

⚠️ Crews are expected to perform paving work along the northbound SR-55 McFadden Avenue off-ramp, which will require closing the ramp from 9 p.m. to 5 a.m. nightly, Wednesday, Sept. 23 and Thursday, Sept. 24 (into Friday morning).

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

Happy Fall from OCTA and the 55 Freeway Project Team! As construction progresses along the corridor, plan ahead and follow posted speed limits.

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

⚠️ Crews are expected to finish paving work along eastbound (EB) Dyer Road underneath the freeway, which will require closing EB Dyer from 9 p.m., Friday, Sept. 18 to 5 a.m., Saturday, Sept. 19. Westbound Dyer will also be closed temporarily during this period.

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

Crews are expected to perform paving work along Dyer Road and Grand Avenue, which will require alternating directional closures on each street.

Westbound Dyer Road and a portion of northbound Grand Avenue is expected to be closed beginning at 9 p.m. tomorrow, Thursday, Sept. 17. Crews are then expected to switch directions and close eastbound Dyer Road and southbound Grand Avenue. Dyer and Grand will fully reopen to motorists by 5 a.m., Friday, Sept. 18. Business access will be maintained.

Crews are expected to perform electrical work along northbound SR-55, which 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. 8 through Friday, Sept. 11.

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

Happy Labor Day from the 55 Freeway Project Team! Construction activities will resume on Tuesday, Sept. 8.

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. Construction activities will resume on Tuesday, Sept. 8.