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I-5 (I-405 to SR-55) Improvement Project

Construction Updates

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Construction Activities at Culver Drive/I-5

WB closure
EB closure
Bridge Demolition & Pile Installation

Nighttime construction activities and closures are starting for the demolition of the outer portions of I-5 at Culver Drive. This work will require full closures of westbound (WB) and eastbound (EB) Culver. Please note, crews will first close one direction of Culver to complete the bridge work before moving to the opposite direction.

Additional activities at the Culver/I-5 bridge include cast-in-drilled-hole (CIDH) and pile driving to widen structures as a part of project improvements. Intermittent nighttime full closures and lane closures on EB and WB Culver at I-5 will occur during the pile driving activity to support I-5 widening work.

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. At least one lane in each direction will remain open at all times, unless otherwise noted. Check back for the 24/7 long-term closure implementation date. Once implemented, the long-term closure will remain in place until mid-2027.

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

Anticipated Dates:
Demolition: Monday, July 13 through Friday, July 17.
Pile Driving: Mid-July through fall 2026.
CIDH: fall 2026.

Anticipated Hours:
Daytime: As early as 6 a.m. to 4 p.m.
Nighttime: As early as 10 p.m. to 5 a.m.

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

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Retaining Wall and Sound Wall Construction

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

Anticipated Dates:
RW along SB I-5 between Culver and Georgia: Ongoing through late 2026.
SW along NB I-5 Culver and Yale Avenue: Ongoing through late 2026.
RW and SW along SB I-5 between Butterfly and Culver: Ongoing through late 2026.
RW along NB I-5 Culver on-ramp: Late July through late 2026.

Anticipated Hours:
Daytime: As early as 6 a.m. to 4 p.m.
Nighttime: As early as 10 p.m. to 5 a.m.

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Coming Soon

Pile driving and CIDH activities under the Peters Canyon Hiking and Riding Trail/I-5 Bridge.

Construction Closures & Detours

View the latest project closures and detours using the interactive map below.



Latest Activity

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Construction Alert
Construction Alert
As of July 13, 2026
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Construction Alert
Construction Alert
As of July 10, 2026
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Construction Alert
Construction Alert
As of July 7, 2026
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Construction Alert
Construction Alert
As of July 2, 2026
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Construction Alert
Construction Alert
As of June 26, 2026
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Construction Alert
Construction Alert
As of June 22, 2026

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