I-405 Freeway Accident Lawyer
The San Diego Freeway (I-405) sees over 400,000 vehicles daily and some of California's worst accidents. If you were injured, we can help.
About the I-405 (San Diego Freeway)
Interstate 405, commonly known as the San Diego Freeway, is a 72-mile freeway that runs through Los Angeles and Orange Counties. Despite its name, it does not actually reach San Diego. The I-405 is consistently ranked as the most congested freeway in the United States, with some sections experiencing gridlock for hours each day.
The freeway runs from Irvine in Orange County through Los Angeles to San Fernando, passing through major areas including Long Beach, LAX, West Los Angeles, and the San Fernando Valley. Its notorious Sepulveda Pass section through the Santa Monica Mountains is among the worst bottlenecks in the nation.
Most Dangerous I-405 Sections
Certain sections of the I-405 have significantly higher accident rates due to design, traffic volume, and driver behavior.
Sepulveda Pass
Between I-10 and US-101
The infamous bottleneck through the Santa Monica Mountains. Stop-and-go traffic leads to frequent rear-end collisions.
LAX Interchange
Near LAX Airport
Complex interchange with confused drivers, heavy merging, and airport-bound traffic creating dangerous conditions.
I-405/I-10 Interchange
West Los Angeles
One of the busiest interchanges in the US, with multiple ramp connections and heavy truck traffic.
I-405/US-101 Interchange
Sherman Oaks
Major interchange connecting the Valley to the Westside, known for aggressive driving and weaving.
Long Beach Section
I-405/I-710 area
Heavy port truck traffic and industrial activity make this section particularly hazardous.
I-405 Accident Cases We Handle
Rear-End Collisions
Stop-and-go traffic causes thousands of rear-end crashes annually
Multi-Vehicle Pileups
Chain reaction crashes common during peak hours and bad weather
Lane Change Accidents
Aggressive merging and weaving leads to side-swipe collisions
Truck Accidents
Commercial vehicles and semis cause devastating freeway crashes
Ramp Accidents
On-ramp and off-ramp merging creates dangerous conflicts
Hit and Run
Freeway hit-and-runs require immediate investigation
Related Accident Resources
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I-405 Accident FAQ
Why is the I-405 so dangerous?
The I-405 is one of the most congested freeways in the United States, carrying over 400,000 vehicles daily. This massive volume, combined with stop-and-go traffic, distracted drivers, aggressive lane changes, and complex interchanges creates conditions for frequent and severe accidents.
What are the most common types of accidents on the I-405?
Rear-end collisions are most common due to sudden stops in heavy traffic. Side-swipe accidents from lane changes, multi-vehicle pileups during peak hours, and accidents at on/off ramps are also frequent. Truck accidents involving semis and commercial vehicles cause the most severe injuries.
What should I do after an I-405 accident?
Safety first—move to the shoulder if possible and turn on hazard lights. Call 911 for injuries. Document everything with photos and get witness information. The CHP will respond to freeway accidents. Seek medical attention, then contact a car accident lawyer familiar with I-405 cases before speaking with insurance companies.
Can I sue for an I-405 accident?
Yes, if another driver caused your accident through negligence (speeding, distracted driving, aggressive lane changes, etc.), you can pursue a personal injury claim. In some cases, Caltrans may share liability if road design or maintenance contributed to the crash.
How long do I have to file a claim for an I-405 accident?
In California, you have 2 years from the accident date to file a personal injury lawsuit. However, if your claim involves a government entity like Caltrans, you must file an administrative claim within 6 months. Contact an attorney immediately to protect your rights.
Injured on the I-405?
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After an I-405 Accident
- Move to shoulder if safe, turn on hazards
- Call 911 - CHP responds to freeway accidents
- Document the scene and get witness info
- Contact us before speaking to insurance