Hours of Service Rule for Truck Drivers

Every year, driver fatigue contributes to thousands of preventable car accidents–particularly truck crashes across California. Understanding the hours-of-service rule for truck drivers is essential if you or someone you love has been injured in a commercial vehicle accident due to a drowsy truck driver. This guide breaks down the hours of service rule for truck drivers, explains how violations are uncovered, and shows what legal options you have.

Key Takeaways Regarding Safety, Violations, and Victims’ Legal Rights After a Truck Accident

• The hours of service rule for truck drivers caps how many hours truck drivers can spend on duty or behind the wheel during any given duty period, specifically to prevent fatigue-related accidents on public roads.
• California enforces its own intrastate HOS regulations that differ from federal rules, including a 12-hour driving limit and a 16-hour on-duty window, for commercial drivers who operate solely within the state.
• When trucking companies or their drivers violate service regulations and cause a crash, injured victims may pursue compensation through a truck accident claim.

Why Hours of Service Regulations Matter After a Truck Accident

The Hours-of-Service rules were established to prevent fatigue-related accidents caused by excessive driving hours. When truck drivers drive for extended periods, they enter a state of exhaustion that impairs alertness and mobility, similar to driving under the influence.

On busy California corridors like I-5, I-10, and the 405, a drowsy driver behind an 80,000-pound commercial motor vehicle is a catastrophic risk, conflicting with road safety. Driver fatigue, skipped rest breaks, and excessive on-duty time lead to slower reaction times, lane drifting, rear-end collisions, and rollovers.

HOS violations connect directly to legal liability. A documented breach of service rules can support claims of negligence against both the driver and the motor carrier that pressured or allowed the violation. Victims often face traumatic brain injuries, spinal cord damage, wrongful death, crushing medical bills, and lost wages, all of which demand aggressive legal representation.

What Are Hours of Service (HOS) Rules?

Hours of Service rules are federal safety regulations issued by the Federal Motor Carrier Safety Administration (FMCSA). This standard controls how long commercial drivers can be on duty, driving, and off duty. These federal rules apply to most drivers subject to interstate commerce, including 18-wheelers, tankers, and vehicles meeting a certain gross vehicle weight rating or gross combination weight rating, along with certain passenger-carrying vehicles.

California also maintains its own service regulations for intrastate drivers who operate only within state lines, enforced by the California Highway Patrol rather than the Federal Motor Carrier Safety Administration. 

Different hos rules also apply depending on vehicle type: property-carrying drivers hauling freight face one set of limits, while passenger-carrying drivers operating buses and shuttles follow another. Determining which hos regulations apply at the time of a crash is often the first legal question in a case. 

Key HOS Definitions

• On-duty time includes all time spent performing work for a motor carrier: driving, inspections, loading, and paperwork. Non-driving duties still count toward the daily cap on on-duty time.
• Driving time is the subset of on-duty time spent operating a commercial motor vehicle on a public road, and it’s the category most tightly tied to mandatory breaks and rest periods.
• Off-duty time means the driver is fully relieved of responsibilities and free to pursue personal activities. A driver on call or waiting for dispatch is not considered off duty.
• Sleeper berth time is rest taken in the truck’s sleeping compartment. Under certain conditions, sleeper berth time can count toward the required off-duty period through approved split-rest configurations.

Mislabeling duty status, such as recording on-duty work as off-duty, is a common way carriers hide violations. When uncovered, falsified duty status records become powerful evidence in litigation.

Federal Hours of Service Rules for Property-Carrying Drivers

Most long-haul carriers moving freight on California freeways are drivers subject to these federal rules whenever they cross state lines or haul goods in interstate commerce.

• 11-hour driving limit: A truck driver can drive a maximum of 11 hours within a 14-hour on-duty window.
• 14-hour driving window: The clock starts when the driver first goes on duty after at least 10 consecutive hours off duty and expires 14 hours later; no further driving is allowed until the next qualifying rest period.
• 10-hour off-duty period: After reaching the driving limit or the end of the driving window, drivers must take 10 consecutive hours off duty. This, enough, off-duty time is a non-negotiable standard under federal regulations.
• Weekly limits: 60 hours in 7 days or 70 hours in 8 days, resettable with a 34-hour off-duty period.
• 30-minute break: Required after 8 cumulative hours of driving time, satisfying mandatory breaks requirements.

Electronic logging device technology for trucks automatically tracks driving hours and records them with precision. After a crash, ELD records, fuel receipts, GPS data, and weigh-station activity are the primary tools used to detect hours-of-service violations. 

Federal HOS Rules for Passenger-Carrying Vehicles

Passenger-carrying drivers are limited to 10 hours of driving after at least 8 consecutive hours off duty, with a 15-hour on-duty window. Weekly limits for passenger-carrying vehicles mirror property-carrying drivers (60/70 hours), but these drivers generally cannot use the 34-hour restart provision available to long-haul carriers.

In a bus or shuttle crash, a key question is whether the operator exceeded passenger-specific HOS limits or was pressured to drive by the transportation company, which requires careful review of the driver’s log and dispatch communications.

The HOS Final Rule and Recent Updates (2020–2026)

The FMCSA issued a significant HOS final rule in 2020 to give drivers more flexibility while maintaining driver safety standards, projecting roughly $274 million per year in national cost savings. Key changes include:

• Expanded short-haul exception: Short-haul drivers operating within a 150 air-mile radius and returning to the same location within a 14-hour shift may qualify for relaxed logbook requirements and, in some cases, exemption from ELD use.
• Adverse driving conditions exception: When unexpected weather, traffic, or road closures arise, drivers may extend driving time and the on-duty window by up to two hours. This adverse driving conditions exception does not eliminate the underlying daily driving limit.
• Revised 30-minute break rule: Now required after 8 cumulative hours of driving time rather than on-duty time, and time spent in on-duty-not-driving status can satisfy it.
• Modern sleeper berth provision: The required 10 hours off duty can be split: at least 7 hours in the sleeper berth plus at least 2 hours off duty, neither portion counting against the 14-hour driving window, giving long-haul carriers more scheduling flexibility.

Ongoing pilot programs launched in 2026 continue to refine how hos rules evolve. Attorneys must track these developments, since the specific hour rule in effect at the time of the collision determines what constitutes a violation.

California’s Hours of Service Rules vs. Federal Regulations

California is unique because it maintains its own service rules for intrastate trucking, enforced by the California Highway Patrol. These rules differ from federal HOS regulations in several important ways:

• 12-hour driving limit after 10 consecutive hours off duty, compared to the federal 11-hour cap.
• 16-hour duty window, compared to the federal 14-hour window.
• 80-hour weekly limit in any consecutive 8-day period, compared to the federal 60/70-hour weekly limits.

California’s laws also specify meal and rest periods for truck drivers under state labor law, and allow agricultural hauling exemptions during harvest season under CCR Title 13 § 1212. As of January 1, 2024, California requires intrastate motor carriers to use electronic logging devices as well.

This dual system, federal regulations for interstate commerce and state rules for intrastate drivers, can create confusion after a crash. One of the first legal questions is whether Federal HOS Regulations or California’s intrastate rules apply at the time of the collision.

Special Exceptions: Short-Haul and Sleeper Berth Time

• Federal short-haul exemption: Drivers operating within a 150-air-mile radius may be exempt from ELD requirements, provided they start and end at the same terminal within a 14-hour window.
• California’s intrastate exemption: Covers a 100-mile air radius under similar conditions for time off duty and reporting location.
• Even exempt short-haul drivers must still observe maximum driving hours and adequate rest requirements, which can be proven through dispatch records, GPS, or timecards.
• Sleeper berth splits: A driver might use a 7/3 or 8/2 hour split to meet the 10-hour off-duty requirement. The precise timing of each duty status often becomes contested in litigation.
• Agricultural exemption: California permits up to 112 hours in 8 days for drivers hauling farm products under specified conditions.

Example scenario: A Central Valley delivery driver claims the short-haul exemption but actually exceeds the radius and drives 13 hours unlogged. Fatigued, the driver rear-ends a car on Highway 99. Dispatch and GPS records later reveal the driver was outside the qualifying exemption and past the driving limit, creating strong evidence of negligence.

How HOS Violations Cause Truck Crashes and Impact Liability

Common violations of hours of service include:

• Driving beyond the 11- or 10-hour driving limit
• Failing to take 10 or 8 consecutive hours off duty as required
• Ignoring the 30-minute break rule after 8 hours driven
• Misusing sleeper berth time or stretching the adverse driving conditions exception
• Falsifying log books under tight delivery schedules, a common form of violating hours

HOS violations do not automatically establish liability, but they are strong evidence of negligence when the fatigue can be linked to how the collision occurred. Courts and insurers look for patterns: extended duty status entries, dispatch pressure, and altered records suggesting that the motor carrier fostered a culture that encouraged drivers to violate hours-of-service requirements. Victims may be entitled to damages for medical costs, lost earnings, pain and suffering, and wrongful death in fatal cases.

How Attorneys Prove Hours of Service Violations

The best truck accident attorneys in Bakersfield and other cities throughout Southern California can obtain and preserve key evidence sources for regulatory compliance investigations, including:

• Electronic logging devices, also referred to as black box data, record showing driving hours, on-duty time, and off-duty period entries
• GPS tracking and toll records that independently verify the truck’s location
• Fuel receipts timestamped during supposed off-duty periods
• Weigh-station tickets and shipping documents showing loading and unloading times
• The truck driver’s official drivers log compared against external data

A fuel receipt purchased at 2:00 a.m. during a period logged as off duty, for example, raises immediate red flags. Attorneys may depose dispatchers and safety managers to uncover pressure to exceed hours or misreport sleeper berth time, then work with accident reconstruction and fatigue specialists to link documented violations to the driver’s diminished alertness at the moment of impact.

What to Do if You Suspect a Truck Driver Was Too Tired or Over Hours of Time Worked

At the scene, if physically able:

• Document the truck’s DOT number, carrier name, and license plates
• Photograph the vehicles and any visible skid marks
• Collect witness contact information

In the days after:

• Keep copies of medical records and work records showing lost income
• Save any communication from the trucking company or its insurer
• Avoid giving recorded statements or signing releases before speaking with a lawyer

Contacting a truck accident lawyer quickly allows the attorney to send preservation letters and request ELD and duty status data before it is overwritten, helping uncover potential HOS violations even when the initial crash report doesn’t mention fatigue.

How Attorney Jeff Car Accident Lawyer Helps in HOS-Related Truck Crashes

Attorney Jeff Car Accident Lawyer is a California-based plaintiff-side personal injury law firm that regularly handles truck accident cases involving suspected hours of service violations. Our approach includes:

• A free initial consultation to assess the facts
• Detailed review of the collision report, medical records, and available evidence
• Early requests for ELD and duty status data before carriers can overwrite it
• Careful comparison of the driver’s recorded hours against both federal regulations and California HOS regulations

The firm operates on a contingency fee basis, meaning no upfront costs and no attorney’s fees unless we secure the maximum truck accident settlement or verdict. We also investigate related safety violations like improper cargo loading and securement, inadequate driver training, poor vehicle maintenance, and negligent hiring.

If a fatigued, over-hours truck driver changed your life or took someone you love, contact Attorney Jeff Car Accident Lawyer today for a free case evaluation.

Frequently Asked Questions

Do hours-of-service violations automatically make the trucking company liable?

No. A violation is strong evidence of negligence, but the injured party must still show a causal link between the fatigue and the crash. Documented violations heavily influence settlement negotiations and how a jury views the carrier’s commitment to driver safety.

How can I tell if the truck driver who hit me was over their hours?

This is difficult to determine at the scene. It’s usually proven later through ELD data, dispatch records, fuel receipts, and GPS tracking obtained during the investigation. Signs like drifting or delayed braking are worth mentioning to your attorney.

What if the driver was operating only within California?

Yes, different rules apply. Intrastate drivers may follow California-specific hos rules: a 12-hour driving limit instead of the federal 11, a 16-hour duty window instead of 14, and an 80-hour weekly limit in any consecutive 8-day period.

How long do I have to file a lawsuit after a truck crash in California?

Generally, two years from the date of the crash, with exceptions for claims involving government entities. Don’t wait; vital HOS evidence can be lost or overwritten if a lawyer doesn’t act quickly to preserve it.

Will it cost me anything upfront?

No. Attorney Jeff Car Accident Lawyer offers free consultations and handles truck accident cases on a contingency fee basis. The firm only collects a fee if it secures compensation through a settlement or verdict. 

Contact an Experienced Truck Accident Attorney 

It’s best to contact a personal injury lawyer as soon as possible. Evidence, witnesses, and legal deadlines make it extremely difficult for victims to be fairly compensated, and early legal assistance significantly strengthens a claim.

If you have been injured in a trucking accident in Bakersfield or in another area of California, schedule a free consultation with Attorney Jeff Car Accident Lawyer. The assessment is free and confidential. 

You do not have to endure this challenging time alone; Jeff’s got you.  

Written By

Michelle Jaco

A content strategist and copywriter based in Orange County, she possesses over ten years of professional writing experience. A graduate of San Diego State University with a B.A. in English, she specializes in building brand identity and enhancing reader engagement, with expertise spanning legal content, software startup copy, and lifestyle branding. When she is not writing in her favorite coffee shop, Michelle is typically traveling, running along the beach, and indulging her sports fandom by cheering on the Kansas City Chiefs and Los Angeles Dodgers (she maintains that she is not a bandwagoner).