Overturned Big Rig Snaps Power Lines in Sun Valley, Snarls Traffic for Miles

An overturned big rig knocked down power lines in Sun Valley on Thursday morning, prompting road closures stretching about a half-mile in each direction as crews worked to assess the scene. The crash happened around 10:30 a.m. at the intersection of Branford Street and San Fernando Road, according to Los Angeles Fire Department officials. The driver managed to escape the wreckage, though the extent of any injuries remains unknown.

Aerial footage captured by Sky5 and reported by KTLA showed power lines sitting directly on top of the overturned truck, a detail relayed by the outlet's Mike Case. The Los Angeles Fire Department is still assessing the scene, and drivers in the area should expect major delays as the closures remain in effect, the station reports.

Why Downed Lines Demand Extreme Caution

Live wires draped across a wrecked vehicle create a uniquely dangerous situation for both the driver and first responders. Official safety protocols from the Los Angeles Department of Water and Power state that motorists trapped in a car or truck with downed power lines should stay inside and call 911 immediately, since stepping onto the ground while touching metal on the vehicle can create a direct path for a fatal electric shock. The utility, which maintains more than 3,500 miles of overhead power lines and serves over 1.6 million electric customers, typically must clear a scene before firefighters or tow crews can safely move a vehicle or reopen a roadway.

That caution helps explain why the closures at Branford and San Fernando are expected to linger and why the fire department's assessment is ongoing. The intersection itself is no stranger to heavy traffic; California Highway Patrol data compiled for the location estimates roughly 26,000 vehicles pass through daily at average uncongested speeds of 29 mph, according to L&F Brown. That volume is part of why a half-mile shutdown in either direction ripples so widely through the surrounding streets.

An Industrial Corridor With a Troubled History

San Fernando Road through Sun Valley has functioned as a dense industrial and freight corridor for decades. Los Angeles City Planning documents show the area has hosted heavy manufacturing and recycling operations for more than 50 years, a legacy that keeps heavy truck traffic dominating local thoroughfares. The stretch has also seen serious wrecks before: in December 2009, a pickup truck collided with a car near this same Branford Street intersection, landed on adjacent tracks, and was struck by a Metrolink train, critically injuring two people, according to the Los Angeles Times.

That history matters because San Fernando Road runs directly alongside the Metrolink Antelope Valley Line, meaning major blockages can risk spilling into the adjacent rail right-of-way, per records from the Southern California Association of Governments. Thursday's crash is the latest in a string of serious truck-related incidents Hoodline has tracked in the area this year, including a rollover along the nearby SR-170 freeway corridor earlier this month that sent a pickup swerving into the carpool lane and flipped a sedan over a freeway divider.

Open Questions and Broader Truck Safety Trends

What exactly caused the rig to overturn — whether load shift, speed, or mechanical failure — has not been determined, and the total duration of the resulting power outage for surrounding businesses remains unclear. Big rig rollovers are not unusual statewide: federal safety research indicates rollover accidents account for 47% of fatal crashes involving light trucks and commercial rigs, compared to just 22% for passenger cars, largely due to their higher center of gravity.

Los Angeles County alone registered 1,731 injury-causing commercial truck accidents in 2024, resulting in 44 fatalities, according to a California crash safety guide. Statewide, provisional Federal Motor Carrier Safety Administration figures for 2024 ranked California second in the nation for large truck crash fatalities with 321 deaths, trailing only Texas, amid a 30% national rise in fatal truck crashes over the past decade. California Vehicle Code also caps commercial truck speeds at 55 mph on all highways and surface roads statewide, a rule aimed at reducing rollover and stopping-distance risks. For now, Sun Valley drivers are being urged to avoid the area and anticipate major delays until crews finish clearing the scene.