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Commercial truck accidents in California come out of a mix of driver error, federal safety regulation violations, maintenance failures, and cargo problems. Working out which of those was in play matters for two reasons: it identifies every party who may be responsible rather than just the driver, and it determines which legal theories are available. Attorney Damoun Yazdi investigates the full chain of causes, using electronic logging device records, engine control module data, maintenance and inspection files, and the carrier’s FMCSA compliance history, starting as soon as the firm is retained.
Key Takeaways
- In the FMCSA and NHTSA Large Truck Crash Causation Study, the truck was assigned the critical reason in 55 percent of the crashes studied, and driver factors accounted for 87 percent of those critical reasons. Brake problems were the most frequently coded associated factor at 29 percent, and fatigue was coded for 13 percent of the truck drivers
- Hours of service limits in 49 CFR Part 395 cap a property-carrying driver at 11 hours of driving inside a 14-hour window after 10 consecutive hours off duty, with a 30-minute break after 8 cumulative hours of driving and a 60-hour or 70-hour ceiling over 7 or 8 consecutive days
- Distracted driving in violation of 49 CFR Section 392.82, speeding, and following too closely are the controllable driver factors that come up most often
- Mechanical failures traceable to inadequate maintenance are carrier failures under 49 CFR Part 396, which extends responsibility past the driver to the company
- Improperly secured or overweight cargo that causes a rollover or spills into traffic can create shipper and loader liability alongside the carrier under 49 CFR Part 393, Subpart I
- Interstate carriers hauling general freight must carry at least $750,000 in public liability coverage under 49 CFR Section 387.9, with $1,000,000 and $5,000,000 tiers for specified hazardous materials, which is why serious truck cases usually involve real coverage rather than a bare state minimum policy
Nicky C
I can't explain in this short review how much Damoun and his team mean to us, but I'll try. My husband was in a near fatal motor cycle accident. He was T-boned by a pick up truck 4 months after we had our baby girl. The stress, fear and sadness I felt could not be measured I had no idea what to do or what happened. I'm so lucky we connected with Damoun and his group. It was a weekend and of course he was working lol. They really took care of us and put our minds at ease. The care and love they give their clients is unreal and I still can't believe how lucky we were to find them. Please if you need help, want someone who cares and will work for you this is the group. Damoun Yazdi you are amazing and so is your group we love you guys. Thank you for changing our lives for the better and for caring.
Driver Fatigue and Hours of Service Violations
The Federal Motor Carrier Safety Administration’s hours of service rules in 49 CFR Part 395 limit how long a commercial driver may stay behind the wheel. For property-carrying drivers, the core limits are 11 hours of driving within a 14-hour on-duty window that begins after 10 consecutive hours off duty, a required 30-minute break after 8 cumulative hours of driving time, and a ceiling of 60 hours on duty in 7 consecutive days or 70 hours in 8 consecutive days, which a driver may reset with 34 or more consecutive hours off duty. There are further provisions for sleeper berth splits, short-haul operations, and adverse driving conditions, and each of them is a place where a log can be manipulated.
Fatigue is a documented factor rather than a rare one. In the Large Truck Crash Causation Study, fatigue was coded for 13 percent of the truck drivers involved. That is significant, but it is not the whole picture, and a case built only on a fatigue theory can miss the stronger evidence. A carrier that builds a dispatch schedule the hours of service rules cannot accommodate, or that pressures a driver to run past the limits and log it otherwise, is exposed in its own right, separate from the driver’s negligence.
Electronic logging device records, dispatch messages, fuel receipts, toll transactions, and delivery timestamps can be cross-checked against each other, and inconsistencies between them are often what proves a violation. Attorney Yazdi requests those records early, because carrier retention schedules are measured in months.
Mechanical Failures and Inadequate Maintenance
49 CFR Part 396 requires every motor carrier to systematically inspect, repair, and maintain the vehicles under its control, and to keep parts and accessories in safe and proper operating condition at all times. Brake failures, tire failures, steering and suspension defects, and lighting failures that cause a crash are the carrier’s responsibility when they trace back to a maintenance program that was not being followed.
The regulation also generates the paper trail. Under Section 396.11 a driver must complete a written post-trip inspection report at the end of each driving day identifying defects that would affect safe operation, and the carrier must certify that repairs were made. Under Section 396.17 the vehicle must have passed a periodic inspection covering the Appendix G components within the preceding 12 months, with the documentation carried on the vehicle. Section 396.7 prohibits operating a commercial vehicle in a condition likely to cause an accident or a breakdown. A gap in those records, or a defect a driver reported repeatedly that was never repaired, is often the strongest evidence in the case.
It is also worth noting how often brakes are involved. Brake problems were the single most frequently coded associated factor in the Large Truck Crash Causation Study, appearing in 29 percent of the crashes studied, which is why a post-crash brake inspection and the brake maintenance history are among the first things to secure.
Other Leading Causes
Distracted driving. 49 CFR Section 392.82 prohibits a commercial driver from using a hand-held mobile telephone while driving, and it also prohibits a motor carrier from allowing or requiring its drivers to do so. Federal penalties reach into the thousands of dollars for drivers and higher for employers who allow or require the conduct, and repeat violations can disqualify a driver from operating a commercial vehicle. A carrier that had no enforceable policy, or that routinely called drivers while they were rolling, faces direct liability rather than merely vicarious liability.
Improperly secured or overweight cargo. Under 49 CFR Section 393.100, in Subpart I of Part 393, cargo must be loaded and secured so that it cannot leak, spill, blow, or fall from the vehicle, and it must be contained or immobilized so that shifting does not compromise the vehicle’s stability or maneuverability. Subpart I sets minimum strength requirements for tiedowns and specific rules for particular commodities. A load that shifts on a curve and rolls the trailer, or that comes off and strikes another vehicle, can implicate the shipper and the party that loaded the trailer as well as the carrier, and federal and state weight limits add a separate line of inquiry.
Speeding and speed too fast for conditions. Vehicle Code Section 22350, California’s basic speed law, prohibits driving faster than is reasonable or prudent given weather, visibility, traffic, and the surface and width of the road, regardless of the posted limit. California also imposes a lower ceiling on heavy vehicles: under Vehicle Code Section 22406, a truck tractor or motortruck with three or more axles or towing another vehicle may not exceed 55 miles per hour anywhere in the state, even on a freeway posted at 65 or 70. That gap is frequently overlooked, and a loaded tractor-trailer running with traffic at 70 miles per hour on Interstate 15 or Interstate 10 is violating Section 22406 by a wide margin. Where a violation of either section caused the crash, Evidence Code Section 669 supplies a rebuttable presumption that the driver was negligent.
Impairment and hiring failures. The drug and alcohol testing rules in 49 CFR Part 382 require pre-employment, random, post-accident, and reasonable-suspicion testing, and they bar a carrier from using a driver who has tested positive and not completed the return-to-duty process. Where a carrier ignored a positive test, skipped required testing, or hired a driver whose record it knew was disqualifying, the conduct can support a claim for punitive damages under California Civil Code Section 3294. That said, the standard is demanding. Section 3294 requires clear and convincing evidence of oppression, fraud, or malice, and subdivision (b) requires that an officer, director, or managing agent of the corporation had advance knowledge of the employee’s unfitness and employed the person with conscious disregard for the safety of others, or authorized or ratified the conduct, or personally engaged in it. Ordinary negligence by a driver does not get there.
Why Insurance Coverage Is Different in Truck Cases
One practical reason to identify the carrier and the type of freight is coverage. 49 CFR Section 387.9 sets minimum public liability limits for interstate motor carriers of property: $750,000 for general, nonhazardous freight in vehicles rated at 10,001 pounds or more, $1,000,000 for certain hazardous materials, and $5,000,000 for the most dangerous categories, including bulk shipments of specified hazardous substances and Class 7 radioactive materials. Many carriers hold considerably more than the minimum, and shippers, brokers, and equipment lessors may carry their own coverage.
The contrast with a private car case is stark. California’s minimum liability limits under Vehicle Code Section 16056 have been $30,000 per person, $60,000 per accident, and $15,000 for property damage since January 1, 2025 under SB 1107. In a serious truck collision, the federal financial responsibility framework is often what makes full compensation realistically available, which is another reason identifying every responsible entity early matters.
Contact The Accident Network Law Group After a Commercial Truck Crash
In a truck case the best proof is perishable and it belongs to the other side: electronic logging device records, dispatch and messaging logs, the engine control module download, driver qualification and drug testing files, and the inspection and repair paperwork required by Part 396. Attorney Damoun Yazdi sends preservation demands and pursues those records early, because a carrier’s retention schedule does not wait for you to finish treatment. Consultations are free, and our firm works on contingency under our No Recovery, No Fee policy, so there is nothing to pay up front.
Our offices in Costa Mesa, Riverside, Rancho Cucamonga, Apple Valley, Victorville, and Bakersfield serve injured people and families across Southern California, including matters in Orange County, Riverside County, San Bernardino County, and Kern County, along the Interstate 5, Interstate 10, Interstate 15, and Highway 99 freight corridors. Se habla espanol.
Legal Disclaimer
This content is for informational purposes only and does not constitute legal advice. The outcome of any case depends on its specific facts and circumstances. Past results do not guarantee future outcomes. Contact The Accident Network Law Group for advice about your individual situation.
