Planned Construction Activity

Visit the Planned Lane Closures interactive website.

Upcoming Caltrans Closures/Activities as of 5/9/23:

The three (3) week closure of the northbound 57 freeway loop on-ramp to complete final improvements.

WHEN: Thursday, May 11 at 8:30 a.m. for approximately three weeks

As part of the 57/Lambert Interchange Improvement Project, Caltrans will be closing the newly constructed northbound 57 freeway loop on-ramp, at Lambert Road, to complete final improvements. The closure is scheduled to begin this Thursday, May 11 at 8:30 a.m. and is expected to re-open in approximately three weeks. During the closure, the left turn lane onto the northbound 57 freeway straight on-ramp will be open. For safety, please follow detour signs and guidance from Caltrans crews and traffic patrol.

Caltrans appreciates the public’s patience while we perform this work. Electronic Changeable Messages Signs will notify drivers of the construction/closure. The work schedule is subject to change due to traffic incidents, weather, availability of equipment and/or materials, and/or construction-related issues.

For more information and updates, you may contact PIO Sheilah Fortenberry at 949-969-5055, or connect with Caltrans District 12 on social media.

View the Caltrans press release.

Please note that in order to safely handle any unforeseen issues and to keep the project on track, it may be necessary to modify the schedule or the work plan. We will make every effort to update the information as soon as it’s received.

Keep informed by following Caltrans’ website and social media platforms: Facebook, Twitter and Instagram. Additionally, follow the City of Brea official news sources for updates. of new Caltrans information. Please allow some extra time, watch for detour information and drive carefully.

For inquiries regarding this project, please contact Caltrans Public Information Officer, Sheilah Fortenberry at (949) 969-5055 or email