As of July 11, 2025

As of July 11, 2025

Haga clic aquí para ver esta informacíon en español.

Segment 1: Lakeview to SR-55

Lakeview Avenue Interchange Rendering

Eastbound SR-91 Loop On-Ramp Closed for Approximately Two Years

The two-year closure of the eastbound (EB) SR-91 loop on-ramp from southbound (SB) Lakeview Avenue began on Monday, July 7.


This closure is required for crews to demolish and reconstruct a retaining wall on EB SR-91 beneath the existing Lakeview bridge and construct an abutment for the new bridge.

Sound Wall Activities

Crews continue construction on a new sound wall along westbound (WB) SR-91. This work will require the installation of cast-in-drilled-hole (CIDH) piles to form the foundation. CIDH work began on Monday, July 7 and will continue as early as 7 a.m. to 5 p.m., weekdays for approximately five weeks.


Click here to learn more about CIDH work.

Crews demolishing the old sound wall to accommodate the new SB SR-55 direct on-ramp that will be built.

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

Crews drilling 16 inch CIDH concrete piles to form the foundation of the new sound wall.

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

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.


  • The EB SR-91 off-ramp at Lakeview
  • As early as 10 p.m., Friday, July 11 to 5 a.m., Saturday, July 12


  • The WB SR-91 straight on-ramp at Lakeview
  • As early as 9 p.m., Friday, July 11 to 5 a.m., Saturday, July 12

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 to facilitate work in the center median of the freeway. 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
  • Nightly, as early as 11 p.m. to 7 a.m., Friday, July 11 and Saturday July 12 (into Sunday morning) and Friday, July 18 (into Saturday morning)


  • WB SR-91 Express Lanes
  • Nightly, as early as 9 p.m. to 5 a.m., Friday, July 11 and Saturday, July 12 (into Sunday morning) and Friday, July 18 (into Saturday morning)

Construction Updates

  • In the coming weeks, crews will begin constructing the subterranean foundation for the new Lakeview Avenue bridge. This will include drilling CIDH piles in the area around the WB SR-91 loop on-ramp. Stay tuned for an overview of how the bridge will be constructed while maintaining access to traffic on Lakeview Avenue!



  • At the end of this month, work will begin in EB SR-91 under the current Lakeview Avenue bridge to construct a retaining wall to support the new bridge structure. Intermittent nightwork will be required for crews to safely perform certain activities.

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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