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SR91PROJECT to 877-676-4182

Did You Know?

The Lakeview Avenue bridge will remain open throughout daytime construction of the new bridge. Some overnight closures will occur. Work will be completed in stages:

1. Crews are currently building the first half of the new bridge alongside the existing one;
2. Once it's ready, traffic will be shifted onto the new half so the old bridge can be removed;
3. Lastly, the second half of the new bridge will be constructed and connected, creating a new structure for drivers.

Click on the image for a step-by-step view of Lakeview Avenue bridge reconstruction.

Pile Driving at Lakeview Avenue

Crews completed the first two portions of pile driving in the center median of the freeway and along westbound (WB) SR-91. Work in the final location, along the eastbound (EB) SR-91 off-ramp, is underway and will continue on weekdays through Friday, Oct. 17. Crews may be on the worksite as early as 6 a.m. and are anticipated to perform pile driving activities from 7 a.m. to 4 p.m. 

For schedules and updates, please visit octa.net/91Construction.

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

Along WB 91 On-Ramp

Crews are expected to continue daily work on the wall starting as early as 7 a.m. to 4 p.m. During the week of Oct. 6, work in this area is anticipated to include asphalt demolition and roadway grading and is expected to continue through Tuesday, Oct. 14. The new sound wall is anticipated to be complete by mid-2026.

Crews pouring concrete to construct the stems, the main structural support of the new sound wall.

Crews starting the installation of the structure backfill along the new sound wall further along the WB 91 on-ramp at Lakeview.

Crews finishing the installation of the structure backfill along the new sound wall further along the WB 91 on-ramp at Lakeview.

Along EB 91 Off-Ramp

Crews are expected to continue demolishing the wall along the EB 91 off-ramp starting as early as 7 a.m. to 4 p.m., through Friday, Oct. 10.

Crews demolishing the existing wall along the EB SR-91 off-ramp.

Crews demolishing the existing wall along the EB SR-91 off-ramp.

Crews demolishing the existing wall along the EB SR-91 off-ramp.

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

Construction on Segment 2 of the SR-91 Improvement project is expected to begin in 
early 2026.

Construction on Segment 3 of the SR-91 Improvement Project is expected to begin in late 2025. Stay tuned for updates.

Freeway and Ramp Closures:

Nighttime lane closures on EB and WB SR-91 will occur regularly throughout construction. At least one lane will be open to traffic at all times, unless otherwise specified.



• WB 91 Straight On-Ramp at Lakeview
• Nightly, as early as 8 p.m. to 5 a.m., Monday, Oct. 6 through Wednesday, Oct. 8
• EB 91 Loop On-Ramp at Lakeview (Two-Year Closure):
• The two-year closure started on July 7, 2025.

91 Express Lanes:

The following nighttime closures of the 91 Express Lanes will occur between SR-55/Tustin Avenue and the Orange County/Riverside County line.

• WB and EB 91 Express Lanes:
• As early as 9 p.m. Friday, Oct. 3 to 5 a.m. Saturday, Oct. 4
• As early as 9 p.m. Friday, Oct. 10 to 5 a.m. Saturday, Oct. 11

For a full list of weekly closures and detours, and the most up-to-date project information, please click on the project Google Map below.

Bookmark the closures and detours map above for quick access to real-time construction information. Click on the construction icons to view activities and closure and detour information. Plan for additional travel time through the area. Detour signs will be in place to assist motorists.

The SR-91 (SR-57 to SR-55) Improvement Project will improve 6.6 miles of State Route 91 (SR-91) through Anaheim, Fullerton, Orange, Placentia and Yorba Linda. The project will improve mobility throughout the corridor, reduce weaving and merging between ramps, and improve on- and off-ramps. The project will reconstruct the La Palma Avenue, Glassell Street, Tustin Avenue and Lakeview Avenue bridges and interchanges with standard lanes, shoulders and sidewalks in each direction. Visit our website for more information on segment and schedule details, octa.net/91improvements.

View common questions about the project.

If your community or organization is interested in receiving a project presentation or briefing, please email the Outreach Team at 91Project@octa.net.