Quick Answer
If you were hurt in a California truck accident and suspect driver fatigue, here is what matters most:
- Federal FMCSA rules cap how many hours a truck driver can be behind the wheel — violations of those rules are direct evidence of negligence.
- Electronic logging devices (ELDs) record every minute of drive time and off-duty time — that data is your best evidence.
- The trucking company — not just the driver — can be held liable when carrier pressure, pay incentives, or negligent supervision contributed to the driver's fatigue.
- Critical evidence can be deleted as soon as 30 days after a crash. You need a legal hold letter sent immediately.
- California gives you two years to file a personal injury lawsuit, but the evidence window is far shorter.
- Nordanyan Law handles truck accident cases on a contingency basis — $0 upfront, no fee unless we win. Call (818) 794-9947 for a free case review.
Truck accidents kill and maim Californians every day. When the driver behind the wheel of an 80,000-pound semi hasn't slept enough, the crash is almost always catastrophic — and almost always preventable. Federal law sets hard limits on how long a truck driver can legally operate. When a carrier or driver breaks those limits and someone gets hurt, the evidence trail is specific, recoverable, and damning — if you move fast enough to preserve it.
This article explains exactly how hours-of-service violations are proved in a California truck fatigue accident case.
The FMCSA Hours-of-Service Limits in Plain English
The Federal Motor Carrier Safety Administration (FMCSA) sets the national rules for how many hours a commercial truck driver can operate a vehicle. These rules are codified at 49 C.F.R. Part 395. California requires all commercial trucks operating in the state to comply with these federal rules.
Under federal FMCSA rules, a commercial truck driver may not drive more than 11 hours after 10 consecutive hours off duty, and may not drive after the 14th consecutive hour since coming on duty.
Here is a plain-English breakdown of the key limits for property-carrying drivers (the most common commercial trucks on California highways):
- 11-hour driving limit. A driver may drive a maximum of 11 hours after taking 10 consecutive hours off duty.
- 14-hour on-duty limit. A driver may not drive beyond the 14th consecutive hour after coming on duty, regardless of how many of those hours were actually spent driving. Stops for fuel, inspections, and loading all count toward the 14-hour clock.
- 30-minute break requirement. Drivers must take a 30-minute break after driving for 8 cumulative hours without a break of at least 30 minutes.
- 60/70-hour limit. A driver may not drive after accumulating 60 hours of on-duty time in 7 consecutive days (or 70 hours in 8 consecutive days). This "weekly cap" resets only after the driver takes at least 34 consecutive hours off duty.
- Sleeper berth rules. Drivers who use a sleeper berth may split their required off-duty time, but specific pairing rules apply under 49 C.F.R. § 395.1(g).
California requires all commercial trucks operating in the state to comply with the federal hours-of-service rules found in Title 49 of the Code of Federal Regulations, Part 395.
A single violation of any of these limits — driving in the 12th hour, skipping the required break, pushing through the 14-hour window — is a direct federal safety violation. When that violation preceded a crash, it is powerful evidence of negligence per se under California law.
Electronic Logging Devices (ELDs) and How Violations Are Spotted
Before December 2017, many drivers kept paper logbooks — and falsified them regularly. The industry phrase for a falsified paper log was a "comic book." Federal law closed that loophole.
An electronic logging device, or ELD, automatically records a driver's hours of service and is required on most commercial motor vehicles operated after December 18, 2017.
Under 49 C.F.R. Part 395, Subpart B, almost all commercial motor vehicles operating in interstate commerce must be equipped with a certified ELD. The device synchronizes with the engine's electronic control module (ECM) and automatically records:
- When the engine is on or off
- Vehicle movement and speed
- GPS location at regular intervals
- Drive time, on-duty time, sleeper berth time, and off-duty time in real time
- Any manual edits the driver makes — along with the original unedited record
That last point matters for litigation. Drivers cannot quietly erase an hours violation. Every edit leaves an audit trail showing the original entry and who changed it, when.
If a truck driver's ELD data, paper logs, or GPS records show a hours-of-service violation at or near the time of the crash, that evidence can establish a direct link between federal non-compliance and your injuries.
Beyond the ELD itself, attorneys pursuing a fatigue case subpoena:
- ECM (black box) data — engine RPM, speed, brake applications, throttle position in the seconds before impact.
- Dispatch and communication records — texts, emails, and satellite messages between the driver and company dispatchers showing pressure to deliver on a tight schedule.
- Fuel and toll receipts — independent timestamps that confirm where the driver was and when, which can contradict a falsified log.
- Weigh station records — DOT weigh station crossings are electronically logged and time-stamped.
- Driver pay records — per-mile pay structures create financial incentives to drive longer and faster than the law permits.
An experienced trucking attorney will send a legal hold letter (sometimes called a spoliation letter) to the carrier within days of the crash demanding preservation of all of this data. Most ELD vendors overwrite data on a 30-day rolling cycle. Once that data is gone, it is gone.
Carrier Pressure and Incentive Structures That Cause Fatigue
Drivers do not typically decide to drive fatigued in a vacuum. The economics of commercial trucking often push them toward it.
Most long-haul drivers in California are paid per mile. That pay structure creates a straightforward incentive: the more miles you drive, the more you earn. Hours spent in a sleeper berth do not generate income. Rest stops cost money. A driver who is already behind on a delivery because of traffic on the I-5 corridor faces a financial and professional penalty for stopping to sleep.
Carriers compound this pressure in several ways:
- Tight delivery windows — shipping contracts that penalize carriers (and drivers) for late arrivals, incentivizing drivers to skip rest.
- Bonuses tied to delivery speed — additional payments that reward drivers for fast completion of routes.
- Dispatcher pressure — documented cases where dispatchers contact drivers mid-route encouraging them to push through.
- Load planning that ignores HOS math — assigning routes that cannot legally be completed within hours-of-service limits without violating them.
When you can document that the company knew or should have known the driver would need to violate federal rules to complete the assigned route on time, you have a claim against the carrier that goes beyond simple respondeat superior.
Negligent Hiring and Supervision Claims Against the Company
Trucking companies can be held liable for driver fatigue under the legal theory of respondeat superior, which holds employers responsible for the negligent acts of employees acting within the scope of their employment.
Under California law, that liability can extend further. If the carrier:
- Hired a driver with a history of HOS violations on their DAC (Driver Application Compliance) report or their FMCSA safety record, and the carrier failed to check or ignored those red flags, that is a negligent-hiring claim.
- Failed to supervise its drivers' logs — for example, if internal records show the fleet manager received ELD alerts about violations and did nothing — that is a negligent-supervision claim.
- Pressured drivers to violate HOS rules through dispatch records, route planning, or pay incentives, that rises to the level of gross negligence or recklessness, which can support a claim for punitive damages under Cal. Civ. Code § 3294.
California's FMCSA-incorporated safety regulations also impose direct duties on carriers. Under 49 C.F.R. § 390.11, a carrier must require compliance with the Federal Motor Carrier Safety Regulations. Failure to do so is an independent basis for carrier liability.
These claims matter for one practical reason: carriers carry significantly higher insurance limits than individual drivers. A commercial trucking policy in California typically carries $750,000 to $5,000,000 in liability coverage under 49 C.F.R. § 387.9. Claims against the carrier — not just the driver — access those higher limits.
Why Preserving Logs Early Decides the Case
Everything described above — the ELD data, the dispatch messages, the pay records, the route assignments — exists in a specific form for a specific window of time after a crash. After that window closes, much of it disappears.
Evidence in a trucking fatigue case — including ELD data, dispatch records, and driver pay stubs — can be destroyed or overwritten as quickly as 30 days after a crash, which is why a legal hold letter must go out immediately.
The federal regulations actually require carriers to retain certain records, but those retention periods are finite:
- Driver records of duty status (HOS logs): 6 months under 49 C.F.R. § 395.8(k).
- Supporting documents (fuel receipts, toll records): 6 months.
- ECM / black box data: Varies by manufacturer — some devices overwrite as quickly as 30 days without a hold in place.
- Carrier accident registers: 3 years under 49 C.F.R. § 390.15.
A legal hold letter sent by your attorney puts the carrier on formal notice that litigation is reasonably anticipated and that destruction of relevant evidence constitutes spoliation — which California courts can penalize with adverse inference jury instructions under Cedars-Sinai Medical Center v. Superior Court (1998) 18 Cal.4th 1. That instruction tells the jury it may presume the destroyed evidence was unfavorable to the carrier.
Beyond the letter, your attorney may seek an emergency preservation order from the court if the carrier does not respond promptly.
This is the single most time-sensitive step in a truck fatigue case. The strength of your eventual case often depends on whether the legal hold went out within the first 48 to 72 hours after the crash.
The Statute of Limitations in California
In California, you generally have two years from the date of a truck accident to file a personal injury lawsuit under California Code of Civil Procedure section 335.1.
However, that two-year window is not an invitation to wait. As explained above, much of your best evidence disappears in the first 30 to 90 days. The statute sets the outer limit — the practical evidence deadline is far earlier.
Additional limitations apply in specific circumstances:
- Claims against a government entity (for example, a crash involving a city-contracted carrier or a government vehicle) require a government tort claim under Cal. Gov. Code § 911.2 within six months of the incident.
- Wrongful death claims run from the date of death, not the date of the crash, under Cal. Code Civ. Proc. § 335.1.
- Injured minors have a tolled limitations period that generally runs until two years after the minor turns 18, under Cal. Code Civ. Proc. § 352.
If you were also injured as part of your job — for example, you are a delivery driver who was hit by another commercial truck — you may have both a workers' compensation claim and a third-party personal injury claim running simultaneously. Those two tracks have different deadlines and different recovery structures. An attorney familiar with both matters, not one who handles only one, is essential in that situation. Our team handles both; you can learn more at /practice-areas/workers-compensation.
What Compensation Can Look Like in a California Truck Fatigue Case
We will not invent average settlement figures here — every case turns on specific facts. What we can tell you is what categories of compensation California law allows an injured person to pursue in a truck accident personal injury case:
- Economic damages: Medical expenses (past and future), lost wages, diminished earning capacity, rehabilitation costs, property damage.
- Non-economic damages: Pain and suffering, emotional distress, loss of enjoyment of life, loss of consortium.
- Punitive damages: Available under Cal. Civ. Code § 3294 when the carrier's or driver's conduct constitutes oppression, fraud, or malice — which a pattern of documented HOS violations combined with management awareness can support.
California's pure comparative fault rule under Cal. Civ. Code § 1714 means that even if you are found partially at fault for the accident, your recovery is reduced proportionally — not eliminated. You can recover even if you bear some share of fault.
FAQ
How do you prove a truck driver was fatigued?
Fatigue is proved through objective records, not the driver's admission. The most powerful evidence is the driver's ELD data showing hours driven, the ECM black box showing speed and braking behavior immediately before the crash, dispatch records showing pressure to meet delivery deadlines, and the driver's pay records showing a per-mile pay structure that incentivizes extended driving. Eyewitness accounts of drifting lanes, failure to brake, or erratic driving corroborate the data. A crash reconstruction expert can tie the physical evidence to the driver's documented impairment.
What are the hours-of-service limits for truck drivers in California?
California requires commercial truck drivers to comply with the federal FMCSA hours-of-service rules at 49 C.F.R. Part 395. For property-carrying drivers, the key limits are: no more than 11 hours of driving after 10 consecutive hours off duty; no driving past the 14th consecutive hour since coming on duty; a mandatory 30-minute break after 8 cumulative hours of driving; and no more than 60 hours on duty in 7 days (or 70 hours in 8 days). Violating any of these limits is a federal safety violation.
Can the trucking company be liable for driver fatigue, not just the driver?
Yes. Trucking companies face liability on multiple theories. Respondeat superior holds the employer responsible for a driver's negligence within the scope of employment. Negligent supervision applies when the carrier had notice of HOS violations and failed to act. Negligent hiring applies when the carrier placed a driver with a documented violation history behind the wheel. Direct negligence applies when the carrier's dispatch schedule, pay incentives, or route planning made HOS compliance practically impossible. These company-level claims matter because carriers carry far higher insurance limits than individual drivers.
What logs prove a fatigue violation?
The primary records are: (1) ELD (electronic logging device) data, which records all drive time, on-duty time, and off-duty time automatically and stores an audit trail of any edits; (2) paper logs, if the driver was on an ELD exemption; (3) ECM data from the truck's black box, which records speed, braking, and engine data; (4) GPS tracking data from the carrier's fleet management system; (5) weigh station crossing records; (6) fuel and toll receipts that independently timestamp the driver's location. A fatigue case rarely depends on just one of these — the strongest cases correlate multiple data sources to reconstruct the driver's actual hours.
How long do I have to sue after a truck accident in California?
Under Cal. Code Civ. Proc. § 335.1, you generally have two years from the date of the accident to file a personal injury lawsuit. If the truck was operated by or under contract with a government entity, a government tort claim must be filed within six months under Cal. Gov. Code § 911.2. Wrongful death cases run from the date of death. These are the legal outer limits — the practical deadline for preserving evidence is 30 to 72 hours after the crash.
What is spoliation and why does it matter in a truck accident case?
Spoliation is the destruction or loss of evidence after a party knew or should have known litigation was anticipated. California courts can penalize spoliation with an adverse inference instruction — essentially telling the jury it may presume the missing evidence would have been harmful to the party that destroyed it. Because ELD data, ECM data, and dispatch records can be overwritten or deleted within 30 days, a legal hold letter sent immediately after the crash forces the carrier to preserve that evidence or face severe consequences at trial.
What if I was also a worker injured on the job in a truck accident?
If you were injured by a truck driver while performing your job duties, you may have two claims: a workers' compensation claim against your employer and a third-party personal injury claim against the truck driver and carrier. These run on parallel tracks with different deadlines, different insurers, and different recovery amounts. You can generally pursue both simultaneously. An attorney who handles both practice areas ensures you do not leave money on the table by pursuing only one. Call (818) 794-9947) to discuss both claims in a single free consultation.
Does California have its own truck fatigue rules beyond the federal FMCSA rules?
California generally incorporates federal FMCSA hours-of-service rules for commercial vehicles operating in interstate commerce. For intrastate carriers (operating solely within California), the DIR and the California Highway Patrol enforce hours-of-service requirements that largely mirror the federal framework under California Vehicle Code § 34501.2 and the regulations adopted thereunder. The key practical point is that virtually any truck involved in a significant California highway accident will be subject to HOS rules, whether federal or state.
Talk to a Truck Accident Attorney Today
If you or a family member was hurt in a California crash involving a commercial truck, the evidence you need to prove a fatigue or hours-of-service violation exists right now — and it may not exist 30 days from now.
We've recovered over $150,000,000 for injured workers and accident victims across Southern California. We handle truck accident cases on a full contingency basis: $0 upfront, no fee unless we win. Our attorneys review every case personally before any advice is given.
Call (818) 794-9947 for a free case review. Available in English and Spanish.
Reviewed by Minas Nordanyan, CA Bar #296806. Last updated June 2026.