Construction Alert as of July 24: Interstate 5 (I-405 to SR-55)

As of July 24, 2026

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Click on this image to view construction activities on the project interactive map.

Image is of a clipboard with a traffic cone on it to encourage people to click on the link next to it to view a detailed closure list

To view and print a detailed list of closures and detours, CLICK HERE!

Segment 2 (Yale Avenue to SR-55)

Project Activities

ONGOING WORK

BRIDGE DEMOLITION AND FULL ROAD CLOSURES AT JAMBOREE ROAD/I-5 BRIDGE

DOWNLOAD DETOUR MAP

Nighttime construction activities and closures continue for the demolition of the outer portions of I-5 at Jamboree Road. This work requires intermittent full road closures of eastbound (EB) Jamboree. Please note that crews may switch between EB and WB directions of Jamboree intermittently to conduct the work and implement closures.

For more information on these closures and associated detours, please view the detour maps above or click on the Google Map.

Anticipated Schedule

Ongoing through late July.

Anticipated Work Hours

Daytime: As early as 6 a.m. to 4 p.m.

Nighttime: As early as 10 p.m. to 5 a.m.

CIDH ACTIVITIES AT PETERS CANYON HIKING & RIDING TRAIL/I-5 BRIDGE

Daytime construction activities are ongoing at the I-5 Peters Canyon Hiking and Riding Trail Bridge for cast-in-drilled-hole (CIDH) work.

Intermittent full closures of the Peters Canyon Hiking and Riding Trail at I-5 may occur through late 2026 for moving equipment in the construction area.

At least one lane in each direction will remain open at all times, unless otherwise noted.

Check back for future demolition work and corresponding closures and detours.

Anticipated Schedule

Ongoing through late 2026.

Anticipated Work Hours

Daytime: As early as 6 a.m. to 4 p.m.

Nighttime: As early as 9 p.m. to 5 a.m.

PILE DRIVING/CIDH ACTIVITIES AT CULVER DRIVE/I-5 BRIDGE

Construction activities continue at the Culver/I-5 bridge, including pile driving to widen structures as a part of project improvements. Intermittent nighttime full closures and daytime lane closures on eastbound (EB) and westbound (WB) Culver Drive at I-5 may occur during the pile driving activity, to support I-5 widening work.

For more information on these closures and associated detours, please click on the Google Map.

24/7 Long-Term Closure: Crews will install concrete barriers and close inside lanes on Culver at the I-5 bridge in both directions for a 24/7 long-term closure to conduct CIDH activities, to be scheduled this fall. Check back for the 24/7 long-term closure date.

Once implemented, the long-term closure will remain in place until mid-2027. At least one lane in each direction will remain open at all times, unless otherwise noted.

Please note: To account for nighttime noise impacts, pile driving and CIDH activities are scheduled during daytime hours. Pile driving activities may be loud at times.

Anticipated Schedule

Pile Driving: Ongoing through mid-August 2026.

CIDH: fall 2026.

Anticipated Work Hours

Daytime: As early as 6 a.m. to 4 p.m.

Nighttime: As early as 10 p.m. to 5 a.m.

RETAINING WALL AND SOUND WALL CONSTRUCTION

Retaining wall (RW) and soundwall (SW) construction activities are ongoing and expected to continue along northbound (NB) and southbound (SB) I-5.

Anticipated Schedule

RW along SB I-5 between Culver and Georgia: Ongoing through late 2026.
SW along NB I-5 Culver and Yale: Ongoing through late 2026.
RW and SW along SB I-5 between Butterfly and Culver: Ongoing through late 2026.
RW along SB I-5 between Tustin Ranch and Jamboree: Ongoing through Late 2026
RW along NB I-5 Culver on-ramp: Late July/early August through late 2026.
RW along NB I-5 near Culver: Late August through Spring 2027.
SW and RW along NB I-5 near Red Hill: September 2026 through early 2027.
RW along NB I-5 near Newport: Fall 2026 through early 2027.

Anticipated Work Hours

Daytime: As early as 6 a.m. to 4 p.m.

Nighttime: As early as 10 p.m. to 5 a.m.

Closures

Daytime work is anticipated to occur behind concrete barriers while nighttime work requires freeway lane closures and intermittent closures of NB and SB I-5 Culver on- and off-ramps.

For more information on closures and associated detours, please click on the Google Map.

COMPLETED! PILE DRIVING AT SR-261/I-5 BRIDGE

TRAFFIC SHIFTS ON RAMPS AND ROADWAY

Crews continue shifting traffic toward the center of I-5 as well as on the Tustin Ranch Road, Jamboree Road and Culver Drive on-and off-ramps.

Anticipated Schedule

Ongoing through late July.

Once shifted, traffic will remain on the temporary paved ramps through spring 2027, before being switched to the permanent newly reconstructed ramps.

Anticipated Work Hours

Daytime: As early as 6 a.m. to 4 p.m.

Nighttime: As early as 10 p.m. to 5 a.m.

OTHER ACTIVITIES

Crews continue with general highway construction including electrical work, concrete barrier (K-rail) and striping activities, equipment transport, and concrete pours, on and along NB and SB I-5. Nighttime full ramp closures and street and freeway lane closures are necessary starting as early as 10 p.m. Friday, July 24 and continuing intermittently until 8 a.m. on Saturday, August 1.

Neighboring Project

City of Irvine Long-Term Closure

Please note: Ongoing through October, the City of Irvine and Irvine Ranch Water District (IRWD) will continue water relocation activities on Culver near the I-5 bridge. This work requires WB Culver under the bridge to be reduced to one lane. Work and lane closures are expected Monday through Friday, from 9 a.m. to 3 p.m. Please contact the City of Irvine or IRWD for more information.

*This work may be loud and ongoing. The schedule is subject to change due to inclement weather or unforeseen operational issues.

*Freeway and street lane closures will occur regularly throughout the duration of the project's construction. At least one lane will be open to traffic at all times, unless otherwise specified. See closure section above for more information.

Segment 1 (I-405 to Yale Avenue)

Project Activities

ONGOING WORK

RETAINING AND SOUND WALL CONSTRUCTION

Retaining wall (RW) and soundwall (SW) construction activities, including demolition of existing walls followed by foundation and general wall construction, are ongoing and expected to continue along northbound (NB) and southbound (SB) I-5.

Anticipated Schedule

RW along SB I-5/Progress near Sand Canyon Avenue: Ongoing through fall 2026.
RW and SW along NB I-5 near SR-133: Early August through early 2027.

Anticipated Work Hours

Daytime: As early as 7 a.m. to 4 p.m.

Nighttime: As early as 10 p.m. to 5 a.m.

Closures

Daytime work is anticipated to occur behind concrete barriers while nighttime work, as needed, requires freeway lane closures and intermittent closures of NB and SB I-5 and related on-and-off-ramps.

For more information on closures and associated detours, please click on the Googe Map.

OTHER ACTIVITIES

Crews continue with vegetation removal, electrical and utility work, and ramp activities on NB and SB I-5 as well as on SR-133. Nighttime full ramp and connector closures, and street and freeway lane closures will be necessary as early as 9 p.m. Monday, July 27 and continuing intermittently until 5 a.m. on Saturday, August 1.

See Google Map for more information on closures and detours.

Anticipated Work Hours

Daytime: As early as 7 a.m. to 4 p.m.

Nighttime: As early as 9 p.m. to 5 a.m.

Neighboring Project

City of Irvine Ongoing Nighttime Closures

Please note: The City of Irvine continues to carry out underground utility activities. Nighttime closures of the median and inside lanes along Sand Canyon Avenue at I-5 are necessary Monday, July 27 through Friday, July 31, between 9 p.m. and 4 a.m. Please contact the City of Irvine for more information.

*This work may be loud and ongoing. The schedule is subject to change due to inclement weather or unforeseen operational issues.

Google Map

Bookmark the closures and detours map above for quick access to real-time construction information. Click on the construction icons to view activities and closure and detour information. Plan for additional travel time through the area. Detour signs will be in place to assist motorists.

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