A new analysis of California crash data by Vaziri Law Group reveals that while large trucks make up a small fraction of vehicles on the road, they continue to play a disproportionate role in fatal crashes across Southern California’s busiest counties.
In 2023, 4,061 Californians lost their lives in motor vehicle crashes, representing nearly 10% of all U.S. traffic deaths that year. Of the 3,727 fatal crashes statewide, 2,347 occurred across just five Southern California counties—Los Angeles, San Diego, Orange, Riverside, and San Bernardino—areas that together account for more than half the state’s population.
The findings show that large trucks were involved in 170 fatal crashes, representing just 7.2% of total vehicles in deadly collisions but causing significant damage and often multiple fatalities per incident. Analysts note that the massive weight, stopping distance, and blind spots of commercial trucks make them inherently more dangerous in high-density areas.
“Although they make up a relatively small share of total traffic, large trucks remain among the most lethal vehicles when collisions occur,” the report states. “Even minor driver errors can lead to catastrophic outcomes.”
The study found that 72.3% of fatal large truck crashes occurred on weekdays, reinforcing the link between commercial traffic and crash frequency. Speeding was a primary factor in 78 fatal truck crashes, suggesting that tight delivery deadlines and long-haul fatigue continue to put both drivers and the public at risk.
Los Angeles and San Bernardino Counties Lead in Truck Crashes
The two largest counties—Los Angeles and San Bernardino—reported the highest large truck crash totals in Southern California. Heavy traffic density, industrial corridors, and warehouse distribution centers are cited as contributing factors.
Meanwhile, Orange County reported the lowest number of large truck crashes (7 total), likely due to stricter urban speed enforcement and fewer freight corridors.
Across the region, large trucks weren’t the only concern. Passenger vehicles still accounted for the overwhelming majority (92.8%) of fatal crash involvement, led by cars and SUVs. However, the data shows that truck-related fatalities tend to cause more secondary harm due to size and speed, especially when pedestrians or smaller vehicles are involved.
Infrastructure and Policy Implications
The study urges state and local governments to adopt preemptive measures that address the growing overlap between freight activity and urban road networks. Recommendations include:
- Expanding commercial truck safety regulations in populated zones
- Enhancing driver rest mandates and delivery time enforcement
- Increasing truck-specific speed cameras in high-risk corridors
- Improving intersection and crosswalk visibility to reduce pedestrian fatalities
As California’s population and freight demand continue to grow, the convergence of commercial, commuter, and leisure traffic is creating more opportunities for fatal collisions.
“With over 70% of truck-related fatalities occurring during the workweek, this isn’t just a public safety issue—it’s a workforce one,” the study emphasizes. “Safer regulations, smarter infrastructure, and better driver accountability are essential to protect everyone on California’s roads.”
About the Study:
This analysis examines 2023 NHTSA fatal crash data from California’s five largest Southern counties to assess how large trucks and light passenger vehicles contribute to traffic deaths. The findings provide a roadmap for improved safety planning, policy enforcement, and commercial regulation across the state.
