The 405: America's Most Congested Freeway
Interstate 405 has earned a distinction that no driver wants: it's consistently ranked the most congested freeway in the United States. Running 72 miles from Long Beach in the south through the South Bay, West Los Angeles, the Sepulveda Pass, and into the San Fernando Valley at Sherman Oaks, the 405 carries over 370,000 vehicles per day at its peak near the Getty Center — more than almost any stretch of road in the country.
What makes the 405 uniquely bad isn't just the volume — it's the geometry. The Sepulveda Pass section between the Westside and the Valley is essentially a mountain pass. There are no practical parallel surface street alternatives, and the freeway narrows precisely at the point where demand is highest. When the Pass backs up, it backs up hard — and there's no easy way around it.
I-405 Corridor: Long Beach to Sherman Oaks
Long Beach to the South Bay (I-405 North)
The southern end of the I-405 begins in Long Beach near the I-710 interchange and runs north through Compton, Gardena, and Hawthorne. This section is heavily influenced by LAX traffic — the I-405/I-105 interchange near Inglewood is the primary airport freeway junction, and it creates consistent congestion both when flights arrive and when workers on LAX-adjacent shifts change over. Late afternoon backups from the 105 interchange can extend the 405 south through Hawthorne and north through Inglewood simultaneously.
The South Bay to West LA (I-405/I-10 Area)
Through El Segundo, Manhattan Beach, and Inglewood, the 405 runs through the South Bay's residential and commercial fabric. The I-405/I-10 interchange near Santa Monica is a critical chokepoint — westbound I-10 (the Santa Monica Freeway) feeds directly onto the 405, adding significant volume from the east during evening rush. Northbound 405 through this zone in the afternoon is one of the most reliably slow sections on the entire corridor.
Check the I-405 Los Angeles cameras to see current conditions from the South Bay through this interchange before you commit to the route.
West LA: The I-405/US-101 Interchange (The Interchange)
Where I-405 meets US-101 near the Getty Center is known simply as "The Interchange" — and it's not hyperbole to call it the busiest interchange in the United States. An estimated 500,000+ vehicles pass through this junction daily. Cameras here are the single most valuable check on the 405 corridor: if this interchange is backed up, the 405 in both directions will be slow for miles in each direction.
Northbound (toward the Valley) in the evenings: Traffic stacks up from this interchange through the Sepulveda Pass and beyond. On bad days, the backup extends past the 405/I-10 junction — meaning you're already in it before you even reach the Pass.
The Sepulveda Pass (Getty Center to Mulholland)
The Sepulveda Pass is the defining bottleneck of the entire I-405 corridor. The freeway climbs from West LA over the Santa Monica Mountains into the Valley — and in both directions, the grade and the lane count create a consistent pressure point. There is no freeway alternative that crosses the Santa Monica Mountains at this location. Sepulveda Boulevard runs parallel but adds 20–30 minutes even when it's moving.
The most important cameras on the entire 405 are the ones through the Pass — between the I-405/US-101 interchange and Mulholland Drive. If these cameras show stopped traffic, plan accordingly. If they show moving traffic, the Pass is open and your commute will be manageable.
Sherman Oaks: The Northern End
At the northern end, I-405 enters the San Fernando Valley and meets US-101 again at the Sherman Oaks interchange — the same I-405/US-101 junction that defines the southern end of the Pass. This interchange is the Valley's gateway to the 405, and morning southbound backup from this point through the Pass is the defining commute pattern for Valley-to-Westside commuters.
Use the I-405 Los Angeles camera page to see the full corridor including the Sherman Oaks end and the Sepulveda Pass cameras.
I-405 Traffic Patterns
| Segment | Worst AM Window | Worst PM Window |
|---|---|---|
| Sherman Oaks → Westside (southbound) | 7–10 AM weekdays | Light |
| Westside → Valley (northbound) | Light | 4–8 PM weekdays |
| I-405/I-105 (LAX area) | 7–9 AM | 4–7 PM + late flights |
| I-405/US-101 Interchange | 7:30–10 AM | 3:30–8 PM |
| South Bay (Long Beach → El Segundo) | 7–9 AM northbound | 4–7 PM southbound |
Alternatives to the 405
Sepulveda Blvd — The only practical surface street over the Pass. Runs parallel to the freeway from the Valley to Westwood/West LA. Much slower than the 405 when both are moving, but can be faster than the 405 when the Pass is completely stopped. Worth checking via camera when the Pass is gridlocked.
US-101 (from Sherman Oaks) — For Valley commuters heading toward downtown or East LA (not the Westside), the 101 may be faster when the 405 is backed up. Check US-101 Los Angeles cameras before switching.
I-110 (Harbor Freeway) — For Long Beach or South Bay commuters heading to downtown LA, the 110 north runs parallel east of the 405. Faster for downtown-bound trips when the 405/I-10 area is gridlocked.
PCH (Pacific Coast Highway) — Only useful for coastal routes (Malibu to Santa Monica or the South Bay). Not a practical alternative for cross-Pass trips.
How to Check I-405 Cameras Before Your Commute
The FreewayFeed I-405 camera page shows every Caltrans camera on the 405 from Long Beach through the South Bay, West LA, the Sepulveda Pass, and into Sherman Oaks — updated every 30 seconds. For a complete door-to-door view that includes alternate routes, use the FreewayFeed route planner. Enter your origin and destination and see every camera along your specific route.
The 405 is the one freeway in LA where checking cameras before you leave is non-negotiable. The Pass cameras are your leading indicator: clear Pass = manageable commute. Stopped Pass = add 30–60 minutes or take Sepulveda. Check them every time.