The San Fernando Valley is home to some of the most heavily trafficked — and most dangerous — freeways in California. With over 1.8 million residents relying on a complex web of interchanges and on-ramps to navigate daily life, the Valley’s freeways are sites of hundreds of serious injury accidents every year.

If you or a loved one has been injured in a freeway accident in the San Fernando Valley, understanding where these accidents occur most frequently — and why — can help you understand the legal landscape for your claim.

US-101 — The Ventura Freeway

The US-101 Ventura Freeway is the spine of the San Fernando Valley, running east-west through Studio City, Sherman Oaks, Encino, Tarzana, and Woodland Hills before continuing west toward Thousand Oaks. It is consistently ranked among the most congested freeways in the nation, and the combination of high volume, frequent on/off-ramp merges, and aggressive driving makes it a consistent site of serious accidents.

Particularly dangerous segments include the Hollywood Split in North Hollywood — where US-101, SR-134, and SR-170 converge — which California federal data identifies as averaging 2.5 fatal crashes per year. The 101 through Woodland Hills near the Topanga Canyon Boulevard interchange is also consistently cited in accident reports involving high-speed collisions and multi-vehicle pileups.

I-405 — The San Diego Freeway

The 405 through the San Fernando Valley — particularly the segment near Sherman Oaks where it intersects with the 101 — is one of the most congested stretches of freeway in the United States. The interchange between the 101 and 405 near Sherman Oaks is a notorious accident zone where freeway speeds meet complex merge patterns and distracted drivers.

The 405 near Sepulveda Pass is also a frequent site of rear-end collisions, as traffic often comes to a complete stop with little warning. Many of the Van Nuys-area accidents involving serious spinal and brain injuries occur on or near 405 on-ramps and off-ramps.

SR-118 — The Ronald Reagan Freeway

The SR-118 cuts through the northern Valley communities of Chatsworth, Northridge, and Granada Hills before connecting with the 405 and 5 freeways. The 118 is characterized by higher speeds, fewer exits, and — in the Chatsworth area — significant commercial truck traffic that creates elevated risk for serious injury collisions.

The interchange of the SR-118 and I-405 near Nordoff Street in Northridge has been the site of multiple fatal crashes in recent years. The Chatsworth-area segments of the 118 are particularly dangerous for motorcyclists, who are vulnerable to high-speed side impacts from trucks merging without adequate visibility checks.

I-5 — The Golden State Freeway

The I-5 through the northern San Fernando Valley — particularly near the SR-118 and I-210 interchange in Sylmar — is identified by California federal data as one of the highest-fatality freeway segments in Los Angeles County. The Golden State Freeway through Sun Valley, between Sunland Boulevard and the Hollywood Freeway connection, averages five fatal crashes per year according to federal highway data.

The I-5 corridor also sees a high volume of big rig and commercial truck traffic due to its role as a major freight corridor, creating significant risk for catastrophic injury collisions.

SR-170 — The Hollywood Freeway

The SR-170 runs through North Hollywood and connects to the 101 at the Hollywood Split — one of the most complex and dangerous interchange configurations in the Valley. Valley Glen, served by the SR-170 between Oxnard Street and Victory Boulevard, averages one fatal crash per year in that relatively short segment.

What to Do After a Freeway Accident in the San Fernando Valley

  • Move to a safe location if your vehicle is drivable — secondary accidents on freeways are extremely common
  • Call 911 — CHP responds to freeway accidents, not LAPD
  • Turn on hazard lights and use road flares or emergency triangles if available
  • Do not stand in traffic lanes while waiting for assistance
  • Photograph everything once you are safely off the roadway
  • Seek immediate medical attention — freeway accidents often involve high-speed impacts with delayed injury symptoms
  • Contact a personal injury attorney before speaking to any insurance adjuster

At Girgis Law Firm, APC, attorney Anthony Girgis represents accident victims injured on the 101, 405, 118, and other San Fernando Valley freeways. He has over 16 years of experience building strong freeway accident claims and negotiating maximum recoveries for clients throughout Encino, Sherman Oaks, Van Nuys, Northridge, Chatsworth, and the greater Valley. Call (818) 986-5000 for a free consultation.

Injured in a car accident in the San Fernando Valley? Contact Girgis Law Firm, APC for a free consultation. Attorney Anthony Girgis represents accident victims throughout Encino, Sherman Oaks, Van Nuys, Northridge, Woodland Hills, Glendale, Tarzana, Studio City, Chatsworth, San Fernando, and surrounding communities. Call (818) 986-5000 — no fees unless we win.