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 February 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.

During the week of March 2, crews are scheduled to continue putting up construction signs within the corridor. K-rail placement and clearing and grubbing activities will follow.

Additional schedule updates will be shared in upcoming alerts.

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.