CONSTRUCTION UPDATE

Week of May 12, 2025

Project Overview

The California Department of Transportation (Caltrans) is making improvements to Interstate 405 (I-405), between Interstate 5 (I-5) and Harbor Boulevard. The project will improve safety for all modes of travel, increase the life expectancy of pavement, enhance traffic operations, and mitigate congestion.

Project Improvements

Enhance safety for traveling public and maintenance crews.


Repair and replace concrete slabs, lanes, traffic loop detectors, and bridge rehabilitation


Traffic management system improvements, including ramp and roadway enhancements, and an updated metering system.


Irrigation and landscape enhancements.


NEW! Park and Ride facility located on Bristol Street at SB I-405.

Contact Us

Email:

Info@revivethe405.com


Helpline:

714-868-6998


Website:

www.ReviveThe405.com
 
 

Nightly lane, ramp, and connector closures are anticipated Monday night, May 12, through Friday night, May 16, from 9 p.m. to 5 a.m.*



* Construction schedule is subject to change.

Crews are conducting roadway and electrical activities at night on northbound (NB) and southbound (SB) I-405 and on freeway ramps. This activity requires intermittent lane and ramp closures at night. 


Please be advised that this work may be loud. Follow detour signs in place to navigate around closures.

Intermittent Freeway Lane Closures on:

  • NB I-405 between I-5 and MacArthur Boulevard
  • SB I-405 between MacArthur Boulevard and Jamboree Road 


Intermittent Ramp Closures*

  • SB I-405 on-ramp from EB University Drive/Jeffrey Road 
  • SB I-405 on-ramp from EB Culver Drive     



* Consecutive ramps will not be closed at the same time.
 
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Caltrans District 12 | 1750 E 4th Street #100 | Santa Ana, CA 92705 US

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