Weekend Travel Alert: I-405 Severe Lane Restrictions in Los Angeles County

Motorists traveling through the Sepulveda Pass should prepare for significant disruptions this weekend.

Key Takeaways

• Southbound I-405 will be reduced to three lanes between Ventura Boulevard and Mulholland Drive.
• Closures run from 9 p.m. Friday, August 21, to 5 a.m. Monday, August 24.
• Northbound lanes will face multi-lane restrictions and complete highway connector shutoffs.
• Speed limits will drop to 55 mph within active work zones.
• Several key ramps will close during the maintenance window.
• A similar schedule is planned for September 11 through 14.

Construction Timeline and Scope

The California Department of Transportation (Caltrans) announced extended weekend restrictions to facilitate an ongoing $143.7 million pavement rehabilitation and barrier installation project. This extensive work spans from Van Nuys to Westwood, aiming to improve safety, mobility, and the overall lifespan of the freeway pavement.

Drivers must navigate around the active construction zone starting at 9 p.m. on Friday, August 21. The restrictions will remain in effect until 5 a.m. on Monday, August 24, with nightly operations continuing through the month. Caltrans officials warn that schedules are subject to change due to weather conditions or operational necessity. Speed limits will be reduced to 55 mph through all active work zones to ensure crew and motorist safety.

Ramp Closures and Traffic Impact

The upcoming maintenance schedule involves specific lane and ramp adjustments that will heavily impact local commuters across both directions of the corridor.

• Lane Reductions: Southbound I-405 will be restricted to three lanes between Ventura Boulevard and Mulholland Drive.
• Ventura Boulevard On-Ramp: Closed for southbound I-405 access.
• Getty Center Drive Off-Ramp: The northbound I-405 exit will be unavailable.
• Northbound Lane Restrictions: Up to five lanes will be closed from Skirball Center Drive/Mulholland Drive to Sepulveda Boulevard, up to four lanes from Wilshire Boulevard to Skirball Center Drive/Mulholland Drive, and up to three lanes from Sepulveda Boulevard to Victory Boulevard.
• Additional Northbound Closures: Off-ramps at Skirball Center Drive/Mulholland Drive, Burbank Boulevard, and Victory Boulevard will shut down. On-ramps at Skirball Center Drive/Mulholland Drive and Burbank Boulevard will also be inaccessible.
• Highway Connector Shutoffs: The northbound I-405 connectors to both northbound and southbound U.S. Route 101 will be completely closed. Similarly, the southbound U.S. Route 101 connector to southbound I-405, along with the northbound U.S. Route 101 connectors to both directions of the freeway, will be shut down.

Nearby residents and commercial properties should expect localized noise, dust, and ground vibrations during active construction hours. Transportation officials strongly advise drivers to utilize public transit or plan alternate routes to avoid severe delays.

September Construction Schedule

The disruptions do not end this month. Caltrans has already scheduled another round of weekend-long lane closures for September 11 through 14. During this period, southbound lanes will again be reduced to three between Ventura Boulevard and Mulholland Drive.

While northbound lanes will remain open, additional ramps will face closures. These include the southbound exit to Valley Vista Boulevard and Sepulveda Boulevard, the corresponding on-ramp, and the northbound exit to Getty Center Drive. Motorists are urged to check real-time traffic updates via the Caltrans QuickMap service before traveling.

Local California Context

The Sepulveda Pass serves as a critical bottleneck for Southern California commuters, linking the San Fernando Valley with the Westside. Any major infrastructure work in this corridor inevitably ripples across the entire regional network. Local agencies continue to coordinate with Caltrans to minimize impacts on emergency services and school bus routes during the overnight shifts.

Background

Pavement rehabilitation projects on older freeways are increasingly common as aging infrastructure requires extensive upkeep. Past resurfacing efforts on the 405 Freeway have similarly caused temporary congestion while ultimately delivering smoother travel conditions and enhanced structural integrity for future decades.

Conclusion

Commuters should adjust their travel plans immediately to account for these unavoidable construction windows. Utilizing alternative roadways or public transportation will save considerable time and frustration. Stay informed by monitoring official traffic channels for any last-minute schedule modifications.