Truck Accidents

Who Is Liable in a Truck Accident in California?

The Herman Firm Legal Team  |  November 2, 2026  |  7 min read  |  Truck Accidents

Liability in a California truck accident can fall on the truck driver, the trucking company, the company that loaded the cargo, a maintenance provider, a vehicle or parts manufacturer, or a combination of them. Trucking companies are generally responsible for the negligence of drivers acting within the scope of their work, and federal safety rules on driving hours, maintenance, and cargo securement often reveal additional responsible parties. Because several parties and insurers can be involved, identifying all of them early is often the key to a full recovery.

That is a very different situation from a typical car crash between two drivers, and it is why many people hurt in these collisions speak with a truck accident lawyer before talking to any insurance company.

Why Truck Accident Cases Are Different

A loaded commercial truck can weigh up to 80,000 pounds, roughly twenty times the weight of a passenger car. Collisions at that size difference often cause severe injuries such as fractures, spinal cord injuries, and traumatic brain injuries. Truck cases also involve rules that do not apply to ordinary drivers. Interstate carriers must follow the Federal Motor Carrier Safety Regulations, California adds its own rules for commercial vehicles, and trucking companies typically carry far larger insurance policies than private drivers. Larger policies usually mean more aggressive defense teams, and the companies involved often begin their own investigation within hours of a crash.

Parties Who May Be Liable

More than one of these parties can share responsibility for the same crash. A fatigued driver, a carrier that pushed an impossible schedule, and a maintenance shop that ignored worn brakes might all contribute to one collision.

Employee or Independent Contractor?

Under California law, an employer is generally responsible for an employee’s negligence within the scope of employment. Some trucking companies respond by arguing the driver was an independent contractor, not an employee. That argument is not always the end of the question. Federal leasing regulations require a carrier operating a leased truck under its authority to take responsibility for that equipment, and the company may still be directly liable for its own negligence in hiring or supervising the driver. Sorting out these relationships usually requires reviewing lease agreements, dispatch records, and the carrier’s operating authority.

Federal Safety Rules That Often Matter

Violations of trucking safety rules can be strong evidence of negligence. The rules that come up most often include:

1. Hours of Service

   Property-carrying drivers generally may drive up to 11 hours after 10 consecutive hours off duty, may not drive beyond the 14th hour after coming on duty, and must take a 30-minute break after 8 cumulative hours of driving. Fatigue-related crashes often trace back to these limits.

2. Electronic Logging Devices

   Most interstate trucks must record driving time on an electronic logging device. These records can confirm or contradict what a driver says about their hours.

3. Driver Qualification

   Carriers must keep qualification files showing a driver’s commercial license, medical certification, and driving history. Gaps can support a negligent hiring claim.

4. Inspection and Maintenance

   Carriers must systematically inspect, repair, and maintain their vehicles, and drivers must complete inspection reports. Missing or falsified records are a common red flag.

5. Drug and Alcohol Testing

   Commercial drivers are subject to testing requirements, including post-accident testing in many serious crashes.

Evidence That Proves Liability

Much of the most important evidence in a truck case is controlled by the trucking company. That can include engine control module or “black box” data showing speed and braking, logging device records, dispatch and route records, maintenance and inspection files, dashcam or onboard camera footage, bills of lading, and the driver’s qualification file. Some of these records only need to be kept for a limited time, which is why a truck accident attorney will typically send a preservation letter early, demanding that the company keep everything related to the crash.

Insurance Coverage in Truck Cases

Federal rules require most interstate carriers hauling general freight to carry at least $750,000 in liability coverage, and carriers hauling certain hazardous materials must carry more. Additional coverage may come from umbrella policies, the trailer owner’s insurer, a shipper’s policy, or a manufacturer’s insurer. Identifying every available policy matters most in serious injury cases, where damages can exceed a single policy limit.

What If You Were Partly at Fault?

California follows pure comparative fault. If you were partly responsible for the crash, your compensation is reduced by your percentage of fault, but you can still recover. Trucking insurers often try to shift blame onto the other driver, for example by claiming you lingered in the truck’s blind spot or cut in front of the rig. Objective evidence such as black box data and camera footage is often what answers those arguments.

Truck Accidents on Contra Costa County Roads

Contra Costa County sits on some of the Bay Area’s busiest freight routes. Interstate 680 runs through Walnut Creek and the San Ramon Valley, Highway 24 connects to Oakland, Highway 4 carries heavy traffic through East County, and Interstate 80 runs along the western edge of the county. Merging zones, construction areas, and stop-and-go congestion on these corridors create real risk when large trucks are involved. Contra Costa County truck accident attorneys familiar with local roads and courts can help reconstruct how and why a crash happened.

Deadlines to Keep in Mind

Most California personal injury lawsuits must be filed within two years under Code of Civil Procedure Section 335.1. If a government vehicle was involved, or a dangerous road condition contributed to the crash, a written claim generally must be filed with the public entity within six months under Government Code Section 911.2. Evidence deadlines often arrive much sooner than legal ones, so acting early matters.

For help building a claim, see our Walnut Creek truck accident lawyer page, or read what evidence you should keep after an injury.

Frequently Asked Questions