As of May 23, 2025

As of May 23, 2025

Haga clic aquí para ver esta informacíon en español.

Segment 1: Lakeview to SR-55

Lakeview Avenue Interchange Rendering

Postponed: Eastbound SR-91 Loop On-Ramp Closure

The long-term closure of the eastbound (EB) SR-91 loop on-ramp from southbound (SB) Lakeview Avenue has been postponed. The date of the closure is to be determined.

Freeway and Ramp Closures

Nighttime lane closures on EB and westbound (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 on-ramp at Lakeview Avenue to close as early as 11 p.m., Friday, May 30 to 7 a.m., Saturday, May 31

91 Express Lanes Closures

The following nighttime closure of the 91 Express Lanes will occur between SR-55/Tustin Avenue and the Orange County/Riverside County line to facilitate striping, k-rail placement and overhead sign removal. Drivers will be directed to use the regular lanes and exit or re-enter the 91 Express Lanes at the county line.


  • EB SR-91 Express Lanes are anticipated to close as early as 11 p.m., Friday, May 30 to 7 a.m., Saturday, May 31
  • WB SR-91 Express Lanes are anticipated to close as early as 9 p.m., Friday May 30 to 5 a.m., Saturday May 31

Sound Wall Activities

Crews are constructing a new sound wall along WB SR-91. This work will require the installation of cast-in-drilled-hole (CIDH) piles to form the foundation. Work will occur from 7 a.m. to 5 p.m., weekdays, beginning as early as Tuesday, May 27 and continuing through July.

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

Lakeview Avenue Bridge Update

In preparation to construct the new Lakeview Avenue bridge, crews have begun what is known as a "settlement" period along the WB SR-91 off-ramp. This process helps compact the soil to ensure long-term stability for the new bridge. The large mound of dirt will remain in place for approximately one month while the earth settles.


Memorial Day

This Memorial Day, the SR-91 team honors those who have made the ultimate sacrifice for our freedom. Thank you for your service! In observance of the holiday, there will be no closures scheduled Friday, May 23 through Monday, May 26. Construction will resume Tuesday, May 27.

Closures and Detours Map

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.

About the Project

Overview

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.

Project Map

 
 

Project Schedule

Please be advised the schedule is subject to change.

Frequently Asked Questions

View common questions about the project.

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

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888-280-7966

91Project@octa.net

octa.net/91Improvements

 

Orange County Transportation Authority | 550 S. Main Street | Orange, CA 92868 US

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