ELD data replaced paper logs
Most commercial drivers must now use an electronic logging device that records driving time by connecting to the engine, replacing paper logs with a data stream that is far harder to manipulate, though not impossible.
Hours of Service California Trucking Violations Explained
Hours of service California trucking regulations exist for one reason: a fatigued driver behind an 80,000-pound vehicle is a hazard on the same scale as an impaired driver. Federal rules cap how long a commercial driver can work and drive without rest, and California layers its own intrastate requirements on top of the federal scheme. When a driver or a carrier violates these limits and a crash follows, the violation becomes one of the most direct paths to establishing negligence in a serious trucking case.
11 hrs
Maximum driving time after 10 consecutive hours off duty
14 hrs
On-duty window that does not pause for breaks or fuel
Hours of Service California Trucking: The Federal Limits
49 CFR Part 395 sets out the core hours-of-service structure for property-carrying commercial drivers. A driver may drive a maximum of 11 hours after 10 consecutive hours off duty. A driver may not drive after the 14th consecutive hour since coming on duty, following 10 consecutive hours off duty, and that 14-hour window does not pause for breaks, meals, or fuel stops. A driver must take a 30-minute break after 8 cumulative hours of driving without at least a 30-minute interruption. A driver may not drive after accumulating 60 hours on duty in 7 consecutive days, or 70 hours in 8 consecutive days for carriers that operate every day, and can reset that weekly clock with 34 or more consecutive hours off duty. These limits interact in ways that create frequent violations: a driver compliant with the daily 11-hour limit can still violate the weekly cap if dispatch scheduling does not track cumulative hours properly across the week.
California's Intrastate Hours-of-Service Rule
For intrastate commercial drivers who never cross state lines, California imposes its own hours-of-service requirement at 13 CCR 1212.5, which in large part mirrors the federal structure but includes state-specific provisions relevant to certain intrastate operations, including some agricultural and construction-related hauling. Carriers operating a mixed fleet, with some drivers running interstate routes and others running purely intrastate routes, must track which regulatory regime applies to each driver and each trip, and confusion about which rule applies is itself sometimes a contributing factor in scheduling that leads to fatigue-related violations.
How Violations Get Uncovered
Falsification still happens
Falsification occurs through techniques such as personal conveyance misuse or unassigned driving segments that a carrier fails to reconcile to a specific driver.
Cross-referencing the record
Falsification is uncovered by comparing ELD data against fuel card timestamps, toll records, weigh station crossings, dispatch communications, and cell phone location data obtained in discovery.
From Violation to Negligence Per Se
An hours-of-service violation does not automatically win a case, but it provides a powerful negligence per se argument under California Evidence Code section 669. To use the violation this way, a plaintiff must show the driver violated a specific hours-of-service regulation, the regulation was designed to prevent the type of harm at issue, the plaintiff belongs to the class the regulation was designed to protect, and the violation was a substantial factor in causing the harm. Expert testimony connects the regulatory violation to the specific mechanism of the crash. ELD data is not preserved indefinitely, so a preservation letter sent promptly after a crash, identifying the specific driver, vehicle, and date range, is essential to lock in this evidence before it is purged. Cases built on documented violations tend to resolve differently than cases relying solely on eyewitness accounts, because the data gives the jury an objective basis for the fatigue argument, and combined with dispatch records it can also support claims against the carrier directly for creating the conditions that led to the violation.
Theory pleaded
Jury finding
11-hour driving limit
Maximum 11 hours driving after 10 hours off duty
14-hour window
No driving after the 14th consecutive on-duty hour
Negligence per se
Available under Evidence Code section 669 when the elements are met
Preservation
ELD data must be locked in before routine deletion
The case behind this page
The complete framework for trucking liability in California
How hours-of-service claims fit within the full range of theories in a serious case.
Read the complete frameworkRelated theory
Discovery strategy for truck driver logs
Securing the electronic logging data that proves an hours-of-service violation.
How the driver data is securedKeep Reading
Related breakdowns from this case and our commercial trucking practice.
Referring an hours-of-service or fatigue trucking matter?
We take commercial trucking fatigue cases as counsel or co-counsel and pay statutory referral fees.
Refer a caseFrequently Asked Questions
What is the 11-hour driving limit?
The 11-hour driving limit is a federal rule under 49 CFR Part 395 that caps a commercial driver's driving time at 11 hours after 10 consecutive hours off duty.
What is the 14-hour rule?
The 14-hour rule prohibits a driver from driving after the 14th consecutive hour since coming on duty, following 10 hours off duty, regardless of how much of that time was spent driving versus performing other tasks.
Does California have separate hours-of-service rules from federal law?
Yes, for purely intrastate drivers. California imposes its own hours-of-service rule at 13 CCR 1212.5, which largely mirrors the federal structure with some state-specific provisions.