Trucking Accidents in California.

Overview

A collision with a commercial truck is one of the most devastating events a person can experience. The physics alone tell the story: a loaded 18-wheeler can weigh 80,000 pounds, while the average passenger car weighs about 4,000. When those two meet, the injuries to the car's occupants are almost always catastrophic.

But trucking cases are also some of the most valuable personal injury cases in California. Federal regulations create a higher standard of care. Multiple defendants mean multiple insurance policies. Black-box data often proves exactly what the truck driver was doing in the seconds before the crash. This page walks you through everything you need to know.

Federal Regulations (FMCSA)

The Federal Motor Carrier Safety Administration regulates interstate commercial motor vehicles through 49 CFR Parts 390–399. These rules apply to vehicles over 10,001 pounds GVWR, vehicles carrying 9+ passengers for compensation, and vehicles hauling hazardous materials. Violating an FMCSA regulation is powerful evidence of negligence in a California case.

Hours of Service (HOS)

Driver fatigue is the number-one cause of serious trucking accidents. The HOS rules exist to prevent it, but violations are common.

Electronic Logging Devices (ELDs)

Since December 2017, most commercial trucks must use Electronic Logging Devices to automatically record driving time. ELDs prevent the falsification of paper logbooks that was rampant for decades. The data is discoverable and can prove exactly how many hours a driver was behind the wheel before the crash.

CDL Requirements and Drug Testing

Commercial drivers must hold a CDL with proper endorsements. A driver operating without a valid CDL is negligent per se. FMCSA also mandates pre-employment, random, and post-accident drug and alcohol testing. Post-accident test results and the driver's full testing history from the FMCSA Clearinghouse are discoverable.

Identifying All Defendants

One of the most important differences between a trucking case and a regular car accident is the number of potentially liable parties. Each defendant may carry its own insurance policy, dramatically increasing the total recovery available.

• The truck driver — individually liable for negligence, fatigue, impairment, or distraction.
• The motor carrier — the company that controls the truck. Liable under respondeat superior and for direct negligence (hiring, training, supervision).
• The vehicle owner — if different from the carrier, often in leased-truck arrangements.
• The freight broker — liable for negligent selection of an unsafe carrier.
• The shipper or loader — liable if improper loading caused a rollover or cargo spill.
• The maintenance company — liable if brake failure, tire blowout, or other mechanical defect contributed to the crash.
• The vehicle or component manufacturer — products liability for defective tires, brakes, steering, or underride guards.

Insurance Coverage Layers

FMCSA requires commercial carriers to maintain minimum insurance based on the type of cargo they haul.

Most trucking companies carry far more than the minimum: a primary policy of $1 million, excess and umbrella layers of $4–9 million, and sometimes additional layers totaling $10–50 million or more. The MCS-90 endorsement on every for-hire carrier's policy acts as a safety net, ensuring minimum coverage even if the policy would otherwise exclude the claim.

Black-Box and ELD Evidence

Modern commercial trucks are rolling data centers. The Electronic Control Module (ECM) records vehicle speed, engine RPM, brake application, throttle position, cruise control status, hard-braking events, and ABS activation. The Event Data Recorder (EDR) captures a pre-crash speed profile (typically 30–60 seconds before impact), brake timing, steering input, and delta-V (change in velocity at impact).

This data requires specialized software and hardware to download — it varies by manufacturer (Cummins, Detroit Diesel, Caterpillar, Volvo). Your attorney should retain a qualified truck ECM/EDR expert to download and interpret the data before it is overwritten.

Common Causes of Trucking Accidents

• Driver fatigue — the number-one cause. Proved through HOS violations in ELD records, sleep disorder history, and the driver's schedule in the days before the crash.
• Distracted driving — cell phone use (both CVC 23123 and FMCSA 49 CFR 392.80/392.82 prohibit hand-held phone use for CMV drivers), dispatch devices, eating.
• Improper loading — overweight cargo, unbalanced loads that cause rollovers, unsecured cargo that falls from the truck.
• Inadequate maintenance — brake deficiency (the number-one mechanical cause per FMCSA data), tire failure, lighting deficiency, steering failure.
• Impairment — the BAC limit for commercial drivers is 0.04%, half the standard limit. The FMCSA Clearinghouse documents all positive tests.

Crash Types

California-Specific Rules

In addition to federal FMCSA regulations, California imposes its own requirements on commercial vehicles. CVC 34500 et seq. sets state safety standards. CVC 34501.2 establishes the Biennial Inspection of Terminals (BIT) program. CVC 35550–35558 set weight limits on California highways. And CVC 21702 imposes maximum driving hours for intrastate drivers, which are not preempted by federal law for purely intrastate operations.

Statutes of Limitation

Two years from the date of the accident for personal injury under CCP § 335.1. Two years from the date of death for wrongful death. Six months to file a government tort claim if Caltrans or a city road-maintenance agency is involved. Products liability claims against the truck or component manufacturer follow the same two-year rule. See Statute of Limitations.

Cross-References

• Motor Vehicle Accidents — general collision framework
• Rideshare (Uber & Lyft) Accidents — commercial vehicle overlay
• DUI-Related Civil Cases — impaired commercial driver
• Wrongful Death — fatal trucking collisions
• Products Liability — defective truck or component
• Comparative Fault — California's pure system

Common Questions