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Motorists traveling both northbound (NB) and southbound (SB) on Lakeview Avenue will now use a new signalized intersection to access the newly realigned westbound (WB) SR-91 straight on-ramp, and the WB SR-91 loop on-ramp at Lakeview Avenue has been permanently closed.

In this configuration, the eastern side of Lakeview Avenue is fully closed to pedestrians through August 2026. The western side is accessible to pedestrians.

Crews are hard at work. You may notice more traffic than usual. Please allow for extra time or utilize alternative routes. 

Crews are installing and tightening strong steel rods (rebar) within the bridge structure. Once tensioned, these strands compress the concrete, increasing strength and durability for future motorists.

Crews are also constructing the diaphragms between the bridge girders. These structural elements connect the beams, improving stability and distributing loads evenly across the bridge.

Photos of concrete barrier, rebar and diaphragm work on the new Lakeview Avenue bridge.

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

Sound and Retaining Wall Construction

Crews continue work on a sound wall along the WB SR-91 on-ramp and a retaining wall along the EB SR-91 on-ramp. Daily construction activities will start as early as 7 a.m. to 4 p.m. The new walls are anticipated to be complete by mid-2026.

Crews placing and grouting the blocks that form the top of the sound wall along the WB SR-91 on-ramp and placing structural backfill for the retaining wall along the EB SR-91 on-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 mid-2026.

In the coming weeks, crews are anticipated to perform striping activities, perform k-rail placement, and clearing and grubbing activities. More information will be provided in following alerts. 

Check the project Google Map for closure updates.

Learn more about planned improvements at octa.net/91Improvements.

Freeway and Ramp Closures:

Nighttime lane closures on EB and WB SR-91 and NB and SB SR-57 are anticipated to occur regularly throughout construction. At least one lane will be open to traffic at all times, unless otherwise specified.

EB SR-91 Off-Ramp at Lakeview

• As early as 9 p.m., Thursday, April 16 to 5 a.m., Friday, April 17

WB SR-91 Loop On-Ramp at Lakeview:

• Permanently closed

EB SR-91 Loop On-Ramp at Lakeview (Two-Year Closure):

• The two-year closure started on July 7, 2025

91 Express Lanes Closures:

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

WB 91 Express Lanes:

• As early as 11 p.m., Friday, April 17 to 5 a.m., Saturday, April 18

EB 91 Express Lanes:

• As early as 11 p.m., Friday, April 17 to 7 a.m., Saturday, April 18

Surface Street Closures:

NB Lakeview Avenue between Santa Ana Canyon Road and Riverdale Avenue

• Nightly, from as early as 10 p.m. to 5 a.m., Monday, April 13 through Friday, April 17 (Into Saturday morning)

The schedule is subject to change due to inclement weather or unforeseen operational issues.

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, Kraemer Boulevard/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.