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SR-91 (SR-57 to SR-55) Improvement Project

Construction Updates

Upcoming SR-91 Nighttime Full Freeway Closures

closure map

WHAT: Demolition of the Lakeview Avenue Bridge is anticipated to require nighttime full freeway closures for the two last weekends of October. Drivers should plan for detours and allow extra travel time.

WHEN:

Westbound closures:

  • As early as 9 p.m. Friday, Oct. 23 through 5 a.m. Saturday, Oct. 24
  • As early as 11 p.m. Saturday, Oct. 24 through 7 a.m. Sunday, Oct. 25
  • As early as 9 p.m. Friday, Oct. 30 through 5 a.m. Saturday, Oct. 31
  • As early as 11 p.m. Saturday, Oct. 31 through 7 a.m. Sunday, Nov. 1

Eastbound closures:

  • As early as 11 p.m. Friday, Oct. 23 through 7 a.m. Saturday, Oct. 24
  • As early as 11 p.m. Saturday, Oct. 24 through 7 a.m. Sunday, Oct. 25
  • As early as 11 p.m. Friday, Oct. 30 through 7 a.m. Saturday, Oct. 31
  • As early as 11 p.m. Saturday, Oct. 31 through 7 a.m. Sunday, Nov. 1

Lakeview Avenue:

  • As early as 11 p.m. Friday, Oct. 23 through 7 a.m. Saturday, Oct. 24
  • As early as 11 p.m. Saturday, Oct. 24 through 7 a.m. Sunday, Oct. 25
  • As early as 11 p.m. Friday, Oct. 30 through 7 a.m. Saturday, Oct. 31
  • As early as 11 p.m. Saturday, Oct. 31 through 7 a.m. Sunday, Nov. 1

CLOSURES:

  • Westbound (WB)/Eastbound (EB) SR-91 freeway under the Lakeview Avenue bridge
  • Lakeview Avenue between the SR-91 WB on- and off-ramps and EB on- and off-ramps
  • WB/EB Express Lanes (SR-55 to the County Line)

These closures are necessary to safely complete the bridge demolition and protect motorists and construction crews. Potential impacts may include backup alarms from construction vehicles, bright lights, noise, and traffic delays. This work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.


As of July 7, 2025, Eastbound SR-91 Loop On-Ramp is Closed for Approximately Two Years

closure map

Construction on Segment 2 of the SR-91 Improvement Project is expected to begin in early 2027.

Segment 3 Construction is Underway

Construction is underway on Segment 3 of the SR-91 Improvement Project. This segment includes improvements to the SR-91 between Acacia Street and La Palma Avenue and surrounding areas designed to improve traffic flow, enhance safety, and support long-term mobility throughout the corridor.

Crews are actively performing bridge, roadway, and utility construction activities throughout the project area. Work may include excavation, concrete placement, utility relocations, retaining wall construction, bridge improvements, and other related construction operations. Construction activities may require periodic daytime and nighttime lane closures, ramp closures, and detours.

Additional construction updates and traffic alerts will be provided as work progresses.

Closures and Detours

La Palma Avenue Bridge Reconstruction

The La Palma Avenue Bridge will be closed for approximately one year to accommodate full demolition and reconstruction of the bridge. Additional information, including closure details and project updates, will be provided as the project progresses.

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

State College Boulevard Bridge Widening

The SR-91 bridge over State College Boulevard is being widened to improve traffic flow and safety. Crews are currently advancing bridge foundation work, excavating the bridge abutments, installing reinforcingreinforced steel for the abutment footings, and forming, pouring, and stripping the abutment footings. Motorists should continue to expect intermittent nighttime closures of State College Boulevard, associated on- and off-ramps, and outside SR-91 freeway lanes as this work progresses.

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

Stay informed with updates

Sign up for our construction alerts, which will be sent regularly when construction starts, by filling out the Stay Informed form. If you have further questions, please feel free to contact our team and we will be happy to help. Previous weekly construction alerts are posted at the bottom of this page.

NEW! You can now sign up to receive important construction notifications. Text SR91PROJECT to 877-676-4182 to subscribe.

Construction Closures & Detours

Closures and detours for the SR-91 Improvement Project


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Contact the SR-91 Community Outreach Team

If you have questions or would like to request information in other language, please contact the Outreach Team at (888) 280-7966 or email 91project@octa.net.

Text SR91PROJECT to 877-676-4182 to receive text alerts.