Interstate 405 Sepulveda Pass Pavement Rehabilitation Project
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Project
The project covers a 10.2-mile stretch of I-405 between the Los Angeles communities of Van Nuys and Westwood along the Sepulveda Pass. The project consists of replacing sections of two lanes in each direction from Victory Boulevard to Mulholland Drive. Sections of other lanes will be repaired to enhance safety and improve mobility along the primary corridor between West Los Angeles and the San Fernando Valley. The project also includes restoring/replacing two overhead sign structures, 98 sign panel replacements, upgrading 6,400 feet of Metal Beam Guardrail and upgrading 10 curb ramps.
Background
The four-year project will apply about $143.7 million toward rehabilitating the primary corridor between West Los Angeles and the San Fernando Valley, a route that experiences heavy, continuous traffic while serving crucial commuter and commercial needs, including access to the Los Angeles International Airport.
Benefits
This project will improve the safety and mobility along I-405 between Van Nuys and Westwood as well as sustainably extend the pavement life. Caltrans will oversee the replacement of sections of two lanes in each direction of I-405 from Victory Boulevard to Mulholland Drive and the rehabilitation of sections of other lanes along the project limits, resulting in the restoration of nearly 92 lane miles overall. Additionally, two overhead sign structures and 98 roadside sign panels identified for replacement will be installed to improve wayfinding.
Schedule
Construction is projected to start in spring/summer 2025 with an anticipated completion in winter 2029.
Cost
The project is estimated to cost about $143.7 million.
I-405 Project FAQs
Q: When will the project start?
A: Spring/Summer 2025.
Q: When is the project expected to be complete?
A: Winter 2029.
Q: What is the cost of the project?
A: The total programmed project costs are $143.7 million.
Q: What are the hours, days and times of construction activities?
A: Specific construction schedules are being finalized and will be shared in advance. There will be nightly closures as part of this project. On select weekends, there will be 55-hour extended partial weekend closures. Twenty-two extended partial weekend closures are planned over four years for this project. Closures will be advertised with message boards and publicized on social media.
Q: Will there be full closures of the freeway for this project?
A: Intermittent full closures are permitted for this project. Schedules will be shared in advance. Closures and detours will be publicized on social media and message boards will be placed around the area to alert motorists.
Q: How many long weekend closures will occur?
A: In order to preserve and extend the pavement life, there are 22 extended partial weekend closures (55 hours) planned over four years lasting from about 10 p.m. Friday night to about 5 a.m. Monday morning. During these closures I-405 could be reduced to two or three lanes in either direction depending on the project’s needs. These closures will not take place during holidays or special events.
Q: Will detour routes be posted when full closures occur?
A: Yes, Caltrans will place signage along the detour route if you need to continue your commute on I-405. Detour routes and full closure notifications will be publicized on social media.
Twitter:twitter.com/CaltransDist7 Instagram:caltransdistrict7
Q: Will Caltrans close consecutive on and off-ramps at the same time?
A: Those traveling along the routes, ramps, and connectors will experience intermittent closures. Schedules will be shared in advance.
Q: Will all the ramps be closed at the same time?
A: No. Not all ramps are closed at the same time. The contractor requests closures ahead of time in case certain ramps need to be closed to bring in construction equipment, or for emergencies. Our traffic management center updates closures regularly on the Caltrans QuickMap when crews call in to open or close a ramp.
Q: Will detour and closure signs be posted?
A: Yes. Since construction is anticipated in 2025, extended closure signs will be posted at the start and end of the construction zone. Signs alerting drivers that there may be temporary closures will also be at ramps in the construction zone. Electronic changeable message signs with detour and closure information will be posted at various locations around the construction zone during construction hours.
Q: How many miles of lanes are being replaced?
A: Approximately 92 lane miles will be replaced for this project.
Q: How many lanes will this project replace?
A: Sections of two lanes of I-405 in both directions from Victory Boulevard to Mulholland Drive will be replaced along with sections of other lanes in the project limits.
Q: Will there be noise associated with this project?
A: According to section 14-8.02 in Caltrans’ 2024Standard Specifications, the nighttime noise level from the contractor’s operations, between the hours of 9 p.m. and 6 a.m., will not exceed 86 A-weighted decibels (dBA) at a distance of 50 feet. According to the Center for Hearing and Communication, this noise level is equivalent to the noise people would experience from a blender, during heavy traffic or at a noisy restaurant. Caltrans District 7 environmental noise and vibration unit will measure noise levels before and during construction to ensure they are in compliance. Noise levels will not exceed state, federal and city regulations.
Q: Will this project install sound walls?
A: No. This is a paving rehabilitation project. Since the passage of Senate Bill 45, the Los Angeles County Metropolitan Transportation Authority (Metro) is now the agency responsible for noise abatement inquiries and sound wall projects within Los Angeles County. For further assistance, please contact: soundwallprogram@metro.net or (213) 922-4008.
Q: Does the project involve landscaping?
A: There is some landscape work as part of this project including irrigation and planting at various locations along the project.
Q: Will any trees be removed for this project?
A: About 13 trees will be removed for the construction of two Maintenance Vehicle Pullouts.
Q: Are you updating the drainage system?
A: There is no new drainage system proposed for this project.
For questions, contact: Repave.405@dot.ca.gov
Recording: I-405 Pavement Rehabilitation Project Virtual Meeting, April 24