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Upcoming Weekend SR-91 Directional Freeway Closures

Upcoming Nightly Directional Freeway Closures for Girder Installation

Crews are anticipated to perform two weekends of nightly directional freeway closures to install girders for the new bridge:

Eastbound SR-91 Directional Freeway Closure

As early as 11 p.m. to 7 a.m., Friday, March 6 (into Saturday morning) and as early as 11 p.m. to 8 a.m., Saturday, March 7 (into Sunday morning), eastbound (EB) SR-91 between the EB SR-91 off-ramp at Lakeview and Imperial Highway is scheduled to close.

Additionally, the following nighttime closures are anticipated to occur Friday, March 6 and Saturday March 7 (into Sunday morning):

• Westbound (WB)/EB 91 Express Lanes between SR-55 and County Line
• Northbound (NB) SR-91 Lakeview between Santa Ana Canyon Road and the WB off-ramp at Lakeview
• EB SR-91 on-ramp at Lakeview
• EB SR-91 off-ramp at Imperial Highway

Check the project Google Map for exact closure times and real time schedule updates.

Westbound SR-91 Directional Freeway Closure

As early as 11 p.m. to 7 a.m., nightly, Friday, March 13 and Saturday, March 14 (into Sunday morning), WB SR-91 between Lakeview Avenue and Tustin Avenue is scheduled to close.

Additionally, the following nighttime closures are anticipated to occur Friday, March 13 and Saturday March 14 (into Sunday morning):

• EB/WB 91 Express Lanes between SR-55 and County Line
• NB SR-91 Lakeview between Santa Ana Canyon Road to the WB off-ramp at Lakeview
• EB SR-91 on-ramp at Lakeview Avenue

Check the project Google Map for exact closure times and real time schedule updates.

As of Monday, March 2 motorists traveling both NB and SB on Lakeview Avenue will use a new signalized intersection to access the newly realigned WB SR-91 straight on-ramp, and the WB SR-91 loop on-ramp at Lakeview Avenue has been permanently closed.

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

New Traffic Pattern:

• NB motorists will turn left at the signal to access the on-ramp
• SB motorists will turn right at the signal

Falsework Construction for New Bridge

Crews have set up falsework, or temporary support structures, to prepare for the next phase of construction. In addition, crews are preparing for the second weekend of girder, steel support beams, installation.

Crews preparing to place temporary structures to build the next step of the new Lakeview Avenue bridge.

Completed concrete pour for a portion of the new Lakeview Avenue bridge.

Crews placing temporary support structures for construction of 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.

Construction on Segment 3 of the SR-91 Improvement Project is underway bringing major upgrades to the SR-91/SR-57 interchange and surrounding areas to improve traffic flow, enhance safety, and support long-term mobility.

During the week of March 9, crews are scheduled to continue installing construction signs within the corridor. K-rail placement and clearing and grubbing activities are anticipated to occur in early April. Additional schedule updates will be shared in upcoming alerts.

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

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 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 10 p.m., Thursday, March 12 to 5 a.m., Friday, March 13

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.

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Address: 5130 E La Palma Ave #101, Anaheim, CA 92807

Phone: 714-312-0031

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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.