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 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 2028/2029.

Cost

The project is estimated to cost about $143.7 million.

I-405 Project FAQs

Due to weather or operational reasons, the schedule is subject to change including the times and dates, the number of closures and other details. Residents and businesses located near construction may experience noise, vibrations and dust associated with construction activities. Please visit the Caltrans Quickmap, at Quickmap.dot.ca.gov, for current road conditions and closures.

Q: When will the project start?

A: Spring/Summer 2025.

Q: When is the project expected to be complete?

A: Winter 2028/2029.

Q: What is the cost of the project?

A: The total programmed project costs are $143.7 million.

Q: Will there be any widening for this project?

A: No. This is a pavement rehabilitation project meaning the current infrastructure is not being changed. Repairs will be made to what is already there.

Q: Who is the contractor for this project?

A: This is a joint venture between CA Rasmussen, Inc. / FBD Vanguard Construction, Inc.

Q: Where is the contractor yard for this project located and what are the hours of work?

A: The contractor yard is a temporary site used by a contractor to store equipment, materials, and potentially a batch plant for producing aggregates or concrete. The contractor yard for this project is located at the Skirball Yard off Mulholland Drive, near American Jewish University. The contractor is scheduled to begin work at this location on June 16, 2025. On regular workdays, no major trucking activities are anticipated between 6 a.m. to 9 a.m. and 5 p.m. to 7 p.m. The contractor will have intermittent traffic lookout while accessing the yard to ensure safety of workers and motorists. Nearby areas can expect noise sources including backup alarms and truck activity. The contractor will comply with the Storm Water Pollution Prevention Plan and implement dust control and street sweeping as needed.

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: What are the hours, days and times of construction activities?

A: Specific construction schedules are being finalized and will be shared in advance. Generally, Monday through Friday there will be overnight lane closures lasting from about 9 p.m. - 6 a.m. where at least two lanes will remain open; however, many overnight closures are restricted to 11 p.m. - 5 a.m. On select weekends, there will be 55-hour extended weekend partial closures where at least two lanes will remain open in each direction. These extended weekend closures are NOT 55-hour full closures. About 20-25 extended weekend partial closures are planned for this project. Closures will be advertised with message boards and publicized on social media in advance.

Q: How many weekend, partial closures will occur?

A: In order to preserve and extend the pavement life, there are about 20- 25 extended weekend partial closures (55 hours) 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. This is NOT a 55-hour full closure of the I-405. These closures will not take place during holidays or special events.

Q: Will there be full closures of the freeway for this project?

A: Overnight, there will be about 15-20 full closures for this project which will happen during short windows of time between 12 a.m. - 5 a.m. when there is a low volume of traffic on the road. Caltrans Traffic Operations monitors traffic for delays and makes adjustments as needed. Closures and detours will be publicized on social media and message boards will be placed around the area to alert motorists.

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 construction interfere with the debris removal efforts in the Palisades?

A: Construction for the I-405 Pavement Rehabilitation project will not occur during peak travel times. Construction work is set to take place overnight along with multiple weekend, partial closures where at least two lanes will remain open. Additionally, work hours will not interfere with the US Army Corps of Engineers' (USACE) debris removal operation, which takes place daily from 6 a.m. to 6:30 p.m. Caltrans is an active participant in the Palisades Fire Incident Command and continues to coordinate daily with various agencies, including USACE, regarding the work surrounding Palisades Fire recovery.

Q: Has Caltrans considered the impact of 25 mph speed limits on Pacific Coast Highway (SR-1) and Topanga Canyon Boulevard (SR-27)?

A: Pacific Coast Highway reopened to the public at 8 a.m., May 23, 2025, following a closure due to Palisades Fire recovery work. Pacific Coast Highway is still an active construction zone between Santa Monica and Malibu, and a 25-mph speed limit is in effect to protect workers and motorists. Topanga Canyon Boulevard (SR-27) reopened to the public at 8 a.m. Friday May 23, from PCH to Grand View Drive. This is limited to daytime hours (5:30 a.m.- 7:30 p.m.) with traffic controls and one-way directional flagging between postmile 2.3 and 2.7 due to ongoing work. Due to the majority of work for the pavement rehabilitation project occurring overnight, Caltrans does not anticipate additional delays on I-405. For the latest updates on PCH and SR-27, check Caltrans District 7 on X.

Q: Will this project be postponed?

A: No. If this project is postponed, the department would need to pay the contractor for suspending the project, exacerbating funds needed to complete the project and creating an additional cost to the taxpayer for money that can be used on additional projects. For context, the department would need to pay the contractor for Time Related Overhead (TRO) for each day they are requested not to work. With this extra cost, the department would need to return to the California Transportation Commission (CTC) and request additional funds that would be needed if this project were postponed.

Q: What about the Olympic and Paralympic Games?

A: For LA28 (the 2028 Olympic and Paralympic Games), all construction activities will be suspended for 3 months in summer 2028. I-405 is also part of the Games Route Network (GRN). The GRN is a network of roads that are designated for the use of Games vehicles traveling between official accommodation venues, competition venues, and other key noncompetition venues.

Q: Will construction be paused during special events and holidays?

A: Construction projects follow moratoriums put in place during special events, holidays, etc. Caltrans works with its partners to determine moratoriums for special events including the 2026 World Cup and 2027 Superbowl.

Q: How long will delays be during construction?

A: Caltrans is acutely aware of the challenge motorists face navigating Los Angeles. Caltrans' Traffic Operations is constantly monitoring delays in our right of way. The department's goal is to keep delays to 15 minutes. Once delays start to reach 15 minutes, the department begins adjusting based on preplanned strategies to mitigate and decrease delays. Caltrans strives to minimize traffic delays due to construction projects, aiming to keep delays to no more than 30 minutes above normal, recurring traffic delays.

Q: What happens if a fire breaks out during construction?

A: Caltrans evaluates construction activity on a project-by project basis during forecasted extreme fire weather by the National Weather Service. If a fire breaks out during construction, the area will be cleared for the safety of workers and the public. If there is an ongoing operation it will be shut down. Historically speaking, Caltrans at times has assisted firefighting efforts with watering trucks and equipment. Caltrans requires contractors to use pre-suppression practices which can include developing vegetation control plans and roadside fire strips. Once a fire agency arrives, the department transitions into a support role and takes direction from the fire department handling the incident. There are various needs when a fire breaks out, which can include opening a route for evacuation or closing a route to protect the firefighting effort. Whatever is the need of the fire agency in charge, the department will do and continue to act in a support role in that event.

Q: Will Caltrans close consecutive on and off-ramps at the same time?

A: Caltrans does not typically close consecutive on and off ramps at the same time during construction. 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. Caltrans Traffic Management Center (TMC) 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. 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. Beyond the specific work zone area, Caltrans will be placing message signs along nearby routes to help divert traffic during the extended weekend, partial closures.

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. The specific areas being replaced depends on the current condition of the roadway which is evaluated by maintenance.

Q: What about the Metro I-405 ExpressLanes Project?

A: Caltrans is in communication and coordinating with the Los Angeles County Metropolitan Transportation Authority (Metro) and they are aware of the I-405 Pavement Rehabilitation Project. TheMetro I-405 ExpressLanes Project is a separate project happening along I-405 from the community of Sherman Oaks to the community of Rancho Park. The project is still considering several alternatives as of June 2025 and will add or convert high-occupancy vehicle (HOV) lanes, or carpool lanes, to dynamically priced, high-occupancy toll (HOT) lanes, called ExpressLanes. Construction of these two projects is not scheduled to overlap as the ExpressLanes Project construction phase is scheduled to begin, at the earliest, in 2029. The I-405 Pavement Rehabilitation project has an estimated completion in winter 2028/2029. For more information on the I-405 ExpressLanes Project call (213) 922-4860 or email405expresslanes@metro.net.

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 for worker safety.

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

Map showing Interstate 405 Repaving Project location