FMCSA Regulations in California Truck Accident Cases

Nearly every commercial truck on a California road operates under detailed written safety rules. When a violation causes a crash, California law may treat it as presumed negligence. That is why a central question in a serious truck accident case is not only who was driving, but which safety rules were broken.

The Federal Motor Carrier Safety Administration (FMCSA) is the federal agency that regulates commercial trucking. Its safety regulations, found in Title 49 of the Code of Federal Regulations, govern who may drive a commercial truck, how long drivers may work, how trucks must be maintained, and how cargo must be secured. These rules address common causes of serious truck crashes, including fatigue, impairment, poor maintenance, unsafe hiring, and unsecured loads.

This guide from our San Diego truck accident attorneys explains the key regulations, how they apply to interstate and California-only trucking, and how violations can support an injury case.

The Key FMCSA Regulations at a Glance

The rules most often involved in truck accident cases fall into several categories:

• Driver qualifications: commercial driver’s license (CDL) testing, endorsements, and minimum qualification standards.
• Medical fitness: regular medical examinations and a valid medical examiner’s certificate.
• Hiring and background checks: driving-record and employment-history investigations before a driver is put on the road.
• Hours of service: limits on driving and on-duty time to prevent fatigue.
• Electronic logging devices (ELDs): tamper-resistant devices that automatically record driving time.
• Drug and alcohol rules: a strict alcohol limit and mandatory testing, including after serious accidents.
• Distracted driving: bans on texting and handheld phone use behind the wheel.
• Inspection and maintenance: daily driver inspections, written defect reports, and periodic inspections.
• Cargo securement: tie-down and loading standards that keep cargo from shifting or spilling.

Each category is covered below, along with the California rules that apply when a truck never crosses state lines.

Do FMCSA Regulations Apply to California Truck Drivers?

Yes, though the governing rules depend on the type of operation. Trucks operating in interstate commerce, meaning trips that cross state lines or carry freight moving between states, are governed directly by federal regulations. Trucks operating only within California are governed by the state’s motor carrier safety rules, issued by the California Highway Patrol in Title 13 of the California Code of Regulations.

California’s rules serve two functions. First, they apply specified federal regulations to California-only trucking, including federal driver inspection and vehicle inspection report requirements, under 13 CCR § 1202.2. Second, they establish California versions of other rules, including the state’s hours-of-service limits for in-state truck drivers, discussed below.

Whether the truck was crossing the country or making local deliveries, it was subject to written safety standards. Early investigation must identify which rules governed the trip because that determines which violations may apply.

Driver Qualifications and Hiring

Driving a commercial truck requires more than an ordinary license. Under 49 CFR Part 383, drivers must pass written and skills tests for the vehicles they will operate. Special endorsements are required for hazardous materials and double or triple trailers. Drivers must also be medically fit. Federal rules require a physical examination and a valid medical examiner’s certificate, and conditions such as uncontrolled epilepsy or severe vision impairment can be disqualifying under 49 CFR § 391.41.

The hiring rules are equally important. Before putting a driver on the road, a trucking company must obtain the driver’s motor vehicle record from every state where the driver held a license during the preceding three years and investigate the driver’s employment history for the same period under 49 CFR § 391.23. The company must maintain this information, along with the CDL, medical certificates, road-test results, and prior drug and alcohol testing history, in a driver qualification file under 49 CFR § 391.51.

The file can reveal what the company knew about its driver before the crash. Prior at-fault accidents, unexplained employment gaps, or missing medical certifications may support a negligent hiring claim against the company, in addition to a claim based on the driver’s conduct. Our guide to who can be held responsible in a truck accident explains these company-level claims.

Hours of Service and Driver Fatigue

Fatigue is a well-documented cause of serious truck crashes, and hours-of-service rules are designed to reduce it. For interstate truck drivers, 49 CFR § 395.3 sets the core limits:

• 11-hour driving limit: a maximum of 11 hours of driving after 10 consecutive hours off duty.
• 14-hour window: no driving after the 14th hour since coming on duty, regardless of breaks.
• 30-minute break: required after 8 cumulative hours of driving.
• Weekly caps: no driving after 60 hours on duty in 7 days or 70 hours in 8 days, with a restart available after 34 consecutive hours off.

California sets different limits for drivers who operate only within the state. Under 13 CCR § 1212.5, an intrastate truck driver generally may drive up to 12 cumulative hours after 10 consecutive hours off duty, may not drive after the 16th hour after coming on duty, and may not drive after 80 hours on duty in 8 consecutive days. Interstate drivers and drivers hauling certain hazardous materials must follow the federal limits even on California-only trips. Determining which limits applied and whether they were exceeded usually depends on the trucking company’s records.

Most of those records are electronic. Under the federal ELD mandate, most commercial trucks must use an electronic logging device that automatically records driving time. California also requires ELD compliance for interstate and intrastate drivers under 13 CCR § 1213.3. ELD data can establish hours violations to the minute. Logs that were edited, deleted, or improperly recorded as “personal conveyance,” an off-duty category sometimes misused to hide driving time, may expose the carrier to additional consequences, including potential penalties for destroying evidence.

Drug and Alcohol Rules

A commercial driver may not operate a truck with a blood alcohol concentration of 0.04% or higher, half the limit that applies to ordinary drivers, under 49 CFR § 392.5. Trucking companies must also maintain a testing program under 49 CFR Part 382. It includes pre-employment drug testing before a driver’s first trip, random testing throughout the year, and reasonable-suspicion testing when a trained supervisor observes signs of impairment.

After a crash, post-accident testing may be required under 49 CFR § 382.303. Testing is mandatory when an accident involves a death. It is also required when the truck driver is cited and either a vehicle is towed from the scene or someone receives medical treatment away from the scene. The deadlines are short: 8 hours for alcohol testing and 32 hours for drug testing.

Failure to conduct required testing is itself a violation. It also prevents the company from ruling out impairment, and the missing test may prove more damaging to the defense than a clean result would have been.

Distracted Driving Rules

Federal rules prohibit commercial drivers from texting while driving under 49 CFR § 392.80 and from holding or dialing a handheld phone under 49 CFR § 392.82. A driver violates the rule by reaching for a device, pressing more than a single button, or taking their eyes off the road to use it. In litigation, cell phone records can be compared with ELD data and crash timing to establish distracted driving.

Truck Inspection and Maintenance

Federal rules require drivers to inspect their trucks and confirm they are in safe working order before every trip under 49 CFR § 396.13. Drivers must also complete written driver vehicle inspection reports (DVIRs) identifying defects at the end of each day. Both requirements apply to California-only operations through 13 CCR § 1202.2. Trucks must pass periodic inspections by qualified inspectors, and companies must maintain records for every vehicle.

Maintenance records often show how a mechanical failure developed. A driver may have reported a defect on a DVIR, only for the company to defer the repair and keep the truck in service. When brakes, tires, or a coupling fail, maintenance files and inspection reports from the months before the crash can establish whether the company had prior notice of the problem.

Cargo Securement

Improperly secured cargo causes rollovers, jackknifes, and road-debris crashes. Federal rules set detailed securement standards, including the number and strength of tie-downs required for different types of cargo, under 49 CFR Part 393, Subpart I. Trucks carrying hazardous materials face additional labeling, containment, and routing requirements. When a load shifts or spills, these rules provide an objective standard for evaluating the conduct of the loading crew and driver.

How Regulatory Violations Become Evidence

Each regulation points to records that can prove or disprove a violation:

• ELD data: the raw log files, not just printed summaries, cross-checked against fuel receipts, toll records, and dispatch instructions.
• The driver qualification file: what the company knew about the driver’s record, health, and history before the crash.
• Testing records: whether required post-accident testing occurred on time and the driver’s full testing history.
• Maintenance records: DVIRs, work orders, and inspection reports for the truck, especially in the months before the crash.
• Dispatch records: when and where the driver was told to be, which can reveal a schedule that could not be met legally.

These records belong to the trucking company, and ordinary retention schedules allow much of this material to be destroyed within months, well before the legal filing deadline. An early preservation letter should demand that the carrier, its insurer, and any freight broker preserve the relevant evidence. Our guide to the truck accident investigation process explains this evidence work step by step.

FMCSA Violations and Negligence Per Se in California

California’s negligence per se doctrine gives regulatory violations significant force at trial. A violation of a safety law may be treated as presumed negligence. Under California Evidence Code § 669, the presumption applies when four elements are established: the defendant violated a statute, ordinance, or regulation; the violation was a proximate cause of the injury; the injury is the type of harm the rule was designed to prevent; and the injured person belongs to the class of people the rule was intended to protect.

A violation of an applicable FMCSA safety regulation can support this presumption when those elements are met, but the result is not automatic. The court decides as a matter of law whether the regulation sets the standard of care for the case. The defendant can rebut the presumption by showing that it acted as a reasonably careful person would have while attempting to comply. If the elements are established, however, the jury is instructed under CACI No. 418 to find the defendant negligent if the violation was a substantial factor in causing the harm.

This shifts the focus from a general debate over reasonable care to a specific safety rule, whether it was violated, and whether the violation caused the crash. The resulting leverage can affect the compensation available to truck accident victims. Our guide to the litigation process in a truck accident lawsuit explains when these theories are pleaded and litigated.

Carrier Safety Records: What Is Public

FMCSA maintains a public Safety Measurement System at ai.fmcsa.dot.gov/SMS. It evaluates motor carriers in seven categories, called BASICs: unsafe driving, hours-of-service compliance, driver fitness, controlled substances, vehicle maintenance, hazardous materials compliance, and crash history. Anyone can search for a carrier by name or DOT number and review its inspection and violation history.

The public data has two important limitations. First, FMCSA does not publicly display a carrier’s percentile scores for Crash Indicator or Hazardous Materials Compliance; those scores are available only to the carrier and enforcement agencies. Second, federal law cautions against drawing conclusions about a carrier’s overall safety condition from the public data alone. The site nevertheless provides useful roadside inspection results, violations, and crash records from the preceding 24 months. In litigation, the records underlying the scores may be obtained through discovery and can reveal patterns of repeated violations. California adds another source of evidence: CHP inspection records from commercial carrier facilities along the I-5, I-15, and I-8 corridors may document a carrier’s local compliance history.

Insurance Minimums and the MCS-90 Endorsement

Federal rules require most interstate motor carriers to maintain minimum liability coverage under 49 CFR § 387.9: $750,000 for general freight and higher amounts for oil and hazardous materials. Many carriers voluntarily carry substantially more coverage, often through layered policies.

The MCS-90 is a federally required endorsement that may obligate an insurer to pay a qualifying judgment up to the federal minimum even when the policy would otherwise exclude coverage. Identifying every layer of available coverage and determining whether an MCS-90 applies are essential to evaluating a serious truck case. Our guide to insurance coverage in truck accident cases explains these issues in more detail.

Deadlines That Control a Truck Accident Case

California generally gives an injured person two years from the date of the crash to file a personal injury lawsuit under Code of Civil Procedure § 335.1. When a public entity is involved, such as a government truck or a dangerous public road, a written claim generally must be presented within six months under Government Code § 911.2. Limited relief for late claims exists, but it is discretionary and should not be relied upon.

Evidence can disappear long before either deadline. ELD data, dashcam footage, and maintenance records may be lost within months under ordinary retention practices. A timely lawsuit cannot restore evidence that was not preserved.

Frequently Asked Questions

What is the FMCSA?

The Federal Motor Carrier Safety Administration is the agency within the U.S. Department of Transportation that regulates commercial trucking and bus companies. It writes and enforces federal safety regulations governing driver qualifications, hours of service, vehicle condition, and drug and alcohol testing.

How many hours can a truck driver legally drive in California?

It depends on the trip. Interstate drivers may drive up to 11 hours within a 14-hour window after 10 hours off duty. Drivers operating only within California generally may drive up to 12 hours and must stop driving by the 16th hour after coming on duty, subject to an 80-hour cap over 8 days.

Are electronic logging devices required in California?

Yes. Federal law requires ELDs for most interstate commercial drivers, and California requires covered intrastate drivers to comply with the ELD rules under 13 CCR § 1213.3, which took effect January 1, 2024.

Does an FMCSA violation automatically prove negligence?

No. Under Evidence Code § 669, a violation creates a presumption of negligence when it caused the injury, the harm is the type the rule was designed to prevent, and the injured person is within the protected class. The trucking company may try to rebut the presumption, but the burden shifts to it.

How Hulburt Law Firm Can Help

Hulburt Law Firm handles serious injury and wrongful death truck accident cases throughout San Diego County. The first weeks of a truck case often require sending preservation letters, obtaining the carrier’s public safety history, and building a discovery plan around the regulations implicated by the crash. We advance all costs, and there is no fee unless we win.

If you or someone you love was hurt in a truck accident in San Diego, call (619) 821-0500 or message us through our contact form for a free, confidential case review.