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Upcoming Nightly Lakeview Avenue Closures
Crews are anticipated to perform construction activities that will require a full Lakeview Avenue street closure between Santa Ana Canyon Road and the westbound (WB) SR-91 off-ramp at Lakeview nightly, as early as Monday, May 4 through Thursday, May 7 (into Friday morning):
Closures:
As early as 8 p.m. to 5 a.m.:
Lakeview Avenue between Santa Ana Canyon Road and the WB SR-91 on-ramp at Lakeview
Eastbound (EB) SR-91 on-ramp at Lakeview
As early as 8 p.m. to 4 a.m.:
WB SR-91 on-ramp at Lakeview
WB SR-91 off-ramp at Lakeview
Crews are anticipated to perform construction activities that will require a full Lakeview Avenue street closure between Santa Ana Canyon Road and the WB SR-91 off-ramp at Lakeview as early as Friday, May 8 (into Saturday morning):
Closures:
As early as 8 p.m. to 5 a.m.:
Lakeview Avenue between Santa Ana Canyon Road and the WB SR-91 on-ramp at Lakeview
EB SR-91 on-ramp at Lakeview
WB SR-91 on-ramp at Lakeview
This work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.
Segment 1: Lakeview to SR-55
Temporary Lakeview Configuration
Motorists traveling both northbound (NB) and southbound (SB) on Lakeview Avenue will now 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.
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.
Lakeview Avenue Bridge Construction
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 weight 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.
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 wall is 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.
Segment 2: SR-55 to SR-57
Construction on Segment 2 of the SR-91 Improvement Project is expected to begin in mid-2026.
Segment 3: SR-57 Interchange
State College Boulevard Construction Activities
Crews have started striping activities and are installing temporary lighting and traffic control systems in the Segment 3 construction zone. Work will occur during both daytime and nighttime hours, with nighttime operations expected throughout much of the week. State College Boulevard will remain open to traffic; however, overnight lane reductions, ramp closures, and connector closures are required to safely complete this work.
More information will be provided in upcoming construction alerts.
Check the project Google Map for closure updates.
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.
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
EB SR-91 to NB SR-57 Connector:
As early as 10 p.m., Monday, May 4 to 5 a.m., Tuesday, May 5
As early as 10 p.m., Tuesday, May 5 to 5 a.m., Wednesday, May 6
As early as 10 p.m., Wednesday, May 6 to 5 a.m., Thursday, May 7
As early as 10 p.m., Thursday, May 7 to 5 a.m., Friday, May 8
As early as 10 p.m., Friday, May 8 to 7 a.m., Saturday, May 9
WB SR-91 to NB SR-57 Connector:
As early as 10 p.m., Monday, May 4 to 5 a.m., Tuesday, May 5
As early as 10 p.m., Tuesday, May 5 to 5 a.m., Wednesday, May 6
As early as 10 p.m., Wednesday, May 6 to 5 a.m., Thursday, May 7
As early as 10 p.m., Friday, May 8 to 7 a.m., Saturday, May 9
WB SR-91 to SB SR-57 Connector:
As early as 10 p.m., Tuesday, May 5 to 5 a.m., Wednesday, May 6
As early as 10 p.m., Wednesday, May 6 to 5 a.m., Thursday, May 7
As early as 10 p.m., Thursday, May 7 to 5 a.m., Friday, May 8
NB SR-57 to WB SR-91 Connector:
As early as 10 p.m., Tuesday, May 5 to 5 a.m., Wednesday, May 6
As early as 10 p.m., Wednesday, May 6 to 5 a.m., Thursday, May 7
As early as 10 p.m., Thursday, May 7 to 5 a.m., Friday, May 8
SB SR-57 to WB SR-91 Connector:
As early as 10 p.m., Monday, May 4 to 5 a.m., Tuesday, May 5
WB SR-91 State College Blvd Off-Ramp:
As early as 11:59 p.m., Monday, May 4 to 5 a.m., Tuesday, May 5
WB SR-91 State College Blvd On-Ramp:
As early as 10 p.m., Monday, May 4 to 5 a.m., Tuesday, May 5
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 9 p.m., Friday, May 8 to 5 a.m., Saturday, May 9
EB 91 Express Lanes:
As early as 11 p.m. Friday, May 8 to 7 a.m., Saturday, May 9
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 projectGoogle Mapbelow.
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
91 Connect Business Program
The "91 Connect: Shop Local, Support Local" program supports businesses along the SR-91 Improvement Project corridor by promoting visibility and minimizing construction impacts through proactive outreach. Business spotlights on the project website, social media, and construction alerts, are all aimed to encourage the community to shop local and raise awareness of local businesses during construction. Click here to learn more.
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, 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.
