Closures and Detours

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

Construction on Segment 2 of the SR-91 Improvement Project is expected to begin in mid-2026.

Segment 3 Construction Coming Soon

Construction on Segment 3 of the SR-91 Improvement Project is expected to begin in early 2026, bringing major upgrades to the SR-91/SR-57 interchange and surrounding areas to improve traffic flow, enhance safety, and support long-term mobility.

Closures and Detours

A key element of this work is the full reconstruction of the La Palma Avenue bridge, which will provide modern lanes, wider sidewalks, and improved shoulders for drivers, pedestrians, and cyclists. To complete this effort, the existing bridge will first be demolished during two weekends of 55-hour directional closures on SR-91, followed by a year-long closure of the bridge itself to allow for reconstruction. These activities will cause temporary disruptions, including detours, ramp closures, and regional traffic impacts, but are necessary to deliver safer, more reliable infrastructure that benefits the entire region.