SR-91 (SR-57 to SR-55) Improvement Project
Construction Updates
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.
As of July 7, 2025, Eastbound SR-91 Loop On-Ramp is Closed for Approximately Two Years
Construction Closures & Detours
Closures and detours for the SR-91 Improvement Project
Social Media Feed
Latest Activity
Construction alert
- As of Oct. 13, 2025
- As of Oct. 3, 2025
- As of Sep. 29, 2025
- As of Sep. 22, 2025
- As of Sep. 15, 2025
- As of Sep. 8, 2025
- As of Aug. 29, 2025
- As of Aug. 22, 2025
- As of Aug. 15, 2025
- As of Aug. 8, 2025
- As of August 4, 2025
- As of July 25, 2025
- As of July 18, 2025
- As of July 11, 2025
- As of July 3, 2025
- As of June 27, 2025
- As of June 20, 2025
- As of June 13, 2025
- As of June 6, 2025
- Week May 30, 2025
- Week May 23, 2025
- Week May 16, 2025
- Week of May 9, 2025
- Week of May 2, 2025
- Week of April 25, 2025
- Week of April 21, 2025
- Week of April 14, 2025
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.