A significant SigAlert on the southbound 405 Freeway in the San Fernando Valley created substantial traffic backups early Wednesday morning. Two lanes were closed for several hours as Caltrans crews worked to repair a damaged section of roadway. Commuters faced severe delays through the Sherman Oaks area.
The California Highway Patrol issued the SigAlert shortly after 5 a.m. Sky5 footage from 6 a.m. showed crews actively addressing a lifted section of the freeway near the 101 Freeway interchange. This unexpected damage caused traffic to stretch back to the 118 Freeway.
Key Takeaways
- Southbound 405 Freeway experienced a SigAlert early Wednesday.
- Two lanes were closed for repairs near Sherman Oaks.
- Traffic backed up significantly, reaching the 118 Freeway.
- Caltrans crews completed repairs by 8:30 a.m.
Morning Commute Disrupted on 405 Southbound
The closure impacted thousands of drivers heading south through the San Fernando Valley. Many commuters reported delays of over an hour. Drivers were advised to seek alternate routes or expect extended travel times.
The exact cause of the roadway damage remains unclear. Caltrans officials have not yet released details regarding what led to the lifted section of asphalt. Investigations are likely to follow to determine the root cause.
"The delays were significant. We saw traffic stretching for miles even before sunrise," a local traffic reporter stated.
Repair Efforts and Reopening
Caltrans crews worked efficiently to address the damage. Their focus was on quickly stabilizing and repairing the affected lanes to restore normal traffic flow. The early morning timing of the incident meant crews could work before the peak of the morning rush hour, though delays were still substantial.
All affected lanes were reopened just before 8:30 a.m. Despite the reopening, authorities urged motorists to continue avoiding the area if possible. The residual backup from the hours-long closure took time to clear, impacting traffic well into the late morning.
Fast Facts
- Incident Start: Just after 5 a.m. PST
- Location: Southbound 405 Freeway near 101 Freeway, Sherman Oaks
- Lanes Affected: Two southbound lanes
- Traffic Impact: Backed up to 118 Freeway
- Lanes Reopened: Just before 8:30 a.m. PST
Impact on Local Traffic and Commuters
The 405 Freeway is one of Los Angeles's most vital transportation arteries. Any disruption on this scale has a ripple effect across the entire region. Local surface streets in Sherman Oaks, Encino, and Van Nuys saw increased congestion as drivers attempted to bypass the freeway closure.
Commuters relying on ride-sharing services also experienced longer wait times and higher fares due to the increased demand and slower travel speeds. This incident highlights the fragility of urban transportation networks when unexpected infrastructure issues arise.
Preventative Measures and Future Outlook
Roadway infrastructure requires constant monitoring and maintenance. Events like this SigAlert underscore the importance of ongoing investment in transportation systems. Regular inspections can help identify potential issues before they escalate into major disruptions.
California's freeways carry millions of vehicles daily. The stress on these roads from heavy traffic and environmental factors necessitates proactive repair and upkeep schedules. This incident serves as a reminder of the critical role played by Caltrans and CHP in maintaining safe and efficient travel for the public.
Understanding a SigAlert
A SigAlert is an advisory issued by the California Highway Patrol (CHP) to inform the public about significant traffic incidents. These alerts indicate that lanes are closed or traffic is severely impacted. They are typically issued for incidents lasting 30 minutes or more or involving full freeway closures. The name originates from a former CHP officer, Sergeant Russ Sigloh, who developed the system.
Avoiding Future Delays
For drivers in the Los Angeles area, staying informed about traffic conditions is crucial. Utilizing traffic apps, local news reports, and freeway message boards can help navigate unexpected delays. Planning routes with alternative options is always advisable, especially during peak commute hours.
While the 405 Freeway lanes are now open, residual congestion may persist for some time. Motorists should remain vigilant and exercise caution when driving through the affected area.





