FMCSA Hours of Service Violations and Texas Truck Accidents

FMCSA hours of service violations — defined under 49 CFR Part 395 — establish that a truck driver exceeded federally mandated driving or on-duty limits, and in a Texas truck accident case, those violations can serve as evidence of negligence per se. Fatigued driving caused by hours of service (HOS) violations is one of the leading causes of serious commercial truck crashes in Texas and across the United States.

Chris Sanchez is a personal injury attorney at The Relentless Lawyer, serving McAllen, Edinburg, Pharr, Mission, and the Rio Grande Valley, Texas.

What Are FMCSA Hours of Service Rules?

The Federal Motor Carrier Safety Administration (FMCSA) promulgated hours of service regulations under 49 CFR Part 395 to limit the amount of time commercial motor vehicle (CMV) operators can spend behind the wheel before mandatory rest. These rules exist because the science is clear: fatigue impairs driving performance in ways that rival alcohol impairment. A driver who has been awake for 18 consecutive hours has reaction time and cognitive function comparable to someone with a blood alcohol concentration of 0.08 percent — the legal limit for impairment.

For property-carrying drivers — the category that covers the vast majority of commercial semi-truck operators — the core federal limits are as follows:

The 11-Hour Driving Limit

Under 49 CFR § 395.3(a)(3), a property-carrying CMV driver may drive a maximum of 11 hours after 10 consecutive hours off duty. Driving beyond the 11-hour limit is a direct violation of federal law and is automatically flagged in the carrier’s compliance records.

The 14-Hour On-Duty Window

Under 49 CFR § 395.3(a)(2), a driver may not drive beyond the 14th consecutive hour after coming on duty, following 10 consecutive hours off duty. This is the total “on-duty window” — it includes all driving time, pre- and post-trip inspections, loading and unloading assistance, fueling, and any other work-related activities. Even if a driver has only driven 7 of their permitted 11 hours, once the 14-hour clock expires, they cannot legally drive again until they complete a 10-hour off-duty period.

The 30-Minute Break Requirement

Under 49 CFR § 395.3(a)(3)(ii), a driver who has driven for 8 cumulative hours without a break must take a 30-minute off-duty or sleeper-berth break before continuing to drive. This rule specifically targets the fatigue that accumulates during extended continuous driving sessions, even within the 11-hour daily driving limit.

The 60/70-Hour Weekly Limits

49 CFR § 395.3(b) imposes cumulative weekly limits based on the carrier’s operating schedule. A driver working for a carrier that operates vehicles every day of the week may not drive after accumulating 70 on-duty hours in 8 consecutive days. Carriers that do not operate every day of the week apply a 60-hour limit over 7 consecutive days. These limits prevent carriers from simply resetting their drivers’ fatigue each day while running them into exhaustion over the course of a week.

The 34-Hour Restart Provision

A driver who has reached their weekly hour limit may restart the 60/70-hour clock by taking 34 or more consecutive hours off duty. This provision allows drivers to continue working across a full week but requires genuine, extended rest before doing so.

Electronic Logging Devices (ELDs) and the Mandate Under 49 CFR § 395.8

For decades, truck drivers maintained their hours of service records in paper logbooks. Paper logs were easily falsified — a practice so common in the industry that falsified logs were sometimes called “creative writing.” In 2017, the FMCSA’s ELD mandate took effect, requiring most commercial motor vehicle drivers subject to HOS rules to use electronic logging devices that automatically record driving time based on the vehicle’s engine, movement, and GPS data.

Under 49 CFR § 395.8, ELDs must be certified to FMCSA technical standards, synchronize with the commercial motor vehicle’s engine to capture accurate driving data, and record the driver’s duty status at each change throughout the day. Carriers are required to retain ELD records for at least six months.

ELD data is among the most valuable evidence in a truck accident case because it is difficult to falsify and provides a granular, time-stamped record of exactly how long the driver had been on duty and behind the wheel at the moment of the crash.

How HOS Violations Establish Negligence Per Se

In Texas, the doctrine of negligence per se provides that when a defendant violates a statute or regulation designed to protect a class of persons from a specific type of harm, and the plaintiff is a member of that protected class, the violation itself constitutes negligence as a matter of law. The plaintiff does not need to prove that the defendant failed to act as a reasonable person would — the violation is the proof.

FMCSA hours of service regulations are squarely within the negligence per se doctrine. They are federal safety regulations enacted specifically to protect the motoring public from the dangers of fatigued commercial truck drivers. A truck driver who was driving beyond the 11-hour daily limit, past the 14-hour window, or in violation of the weekly cumulative limits at the time of a crash has, by operation of the negligence per se doctrine, established the negligence element of the plaintiff’s case.

The remaining question is causation — whether the fatigue resulting from the violation was a proximate cause of the crash. Expert testimony from a trucking industry safety consultant or accident reconstructionist is frequently used to establish this causal link.

Carrier Liability for HOS Violations

Hours of service violations do not just reflect on the individual driver. Under FMCSA regulations, motor carriers bear independent responsibility for ensuring that their drivers comply with HOS rules. A carrier that pressures dispatchers and drivers to meet delivery schedules at the expense of federally mandated rest requirements, fails to monitor ELD data for violations, or creates financial incentives for drivers to drive beyond legal limits can face direct negligence claims for those failures.

FMCSA safety audits and compliance records — which are publicly searchable through the FMCSA’s Safety Measurement System (SMS) — often reveal whether a carrier has a pattern of HOS violations across its fleet. A carrier with multiple prior HOS violations who fails to correct the problem and a driver is then injured as a result may support a claim for punitive damages based on gross negligence.

How Attorneys Obtain HOS Records and ELD Data

In litigation, HOS records and ELD data are obtained through discovery — specifically through subpoena or document requests directed to the trucking company and, in some cases, directly to the ELD service provider. Attorneys issue spoliation letters immediately after retention to demand that the carrier preserve all ELD data, driver logs, dispatch records, and trip records. Because ELD systems often store data on a rolling basis that overwrites records after 30 days or less, this preservation demand must be issued as quickly as possible after the accident.

Additional sources of HOS violation records include:

• FMCSA roadside inspection reports, which are entered into the Motor Carrier Management Information System (MCMIS)
• FMCSA safety audit findings from the carrier’s compliance history
• State-level truck inspection records from the Texas Department of Public Safety
• Carrier dispatch records showing scheduled versus actual delivery times
• Fuel receipts and toll records that can be cross-referenced against ELD logs to identify discrepancies

HOS Violations in Rio Grande Valley Truck Traffic

The I-2/US-83 corridor that runs through McAllen and the broader Rio Grande Valley is a major commercial freight artery connecting border crossing traffic from Mexico to distribution networks throughout Texas and the United States. Drivers transporting goods across international borders, often under tight delivery windows and with complex cross-border logistics, are particularly vulnerable to accumulating HOS violations. The pressure to meet border crossing schedules and delivery deadlines creates conditions in which fatigue-related violations occur at elevated rates.

Frequently Asked Questions

What is the maximum number of hours a truck driver can legally drive per day?

Under 49 CFR § 395.3(a)(3), a property-carrying commercial truck driver may drive a maximum of 11 hours in a single day after completing 10 consecutive hours off duty. Driving beyond this limit is a federal violation and constitutes strong evidence of negligence in a Texas personal injury case.

What is the 14-hour rule for truck drivers?

The 14-hour rule under 49 CFR § 395.3(a)(2) prohibits a commercial truck driver from driving beyond the 14th consecutive hour after coming on duty following 10 hours off duty. This is the total on-duty window, not just driving time. Once 14 hours have elapsed since the driver went on duty, they cannot legally operate a commercial motor vehicle until they have rested for 10 consecutive hours.

What is an ELD and how does it record driving time?

An electronic logging device (ELD) is a federally certified device that connects to a commercial vehicle’s engine and automatically records the driver’s hours of service data based on the vehicle’s operational status. ELDs synchronize with the engine to capture when the vehicle is moving, engine-on-idle time, and driver status changes. Under 49 CFR § 395.8, most commercial drivers subject to HOS rules are required to use certified ELDs rather than paper logs.

Can paper logbooks still be falsified even with the ELD mandate?

For drivers covered by the ELD mandate, paper logs are generally no longer permitted as a substitute. ELD data is harder to falsify than paper because it is synchronized with the vehicle’s engine data. However, some drivers still attempt to manipulate ELD records through improper duty-status changes, and some categories of drivers are exempt from the ELD mandate. Discrepancies between ELD data, fuel receipts, toll records, and GPS data can expose falsification.

How do I find out if a trucking company has a history of HOS violations?

The FMCSA’s Safety Measurement System (SMS) is a publicly accessible database at safer.fmcsa.dot.gov that displays carrier safety ratings, roadside inspection results, and violation histories. The FMCSA BASIC (Behavior Analysis and Safety Improvement Categories) scores show whether a carrier has elevated rates of HOS violations, unsafe driving, vehicle maintenance deficiencies, and other safety-relevant categories. Your attorney can access more detailed MCMIS records through discovery.

Is fatigued driving treated like drunk driving in a Texas lawsuit?

While fatigued driving is not identical to drunk driving from a legal standpoint, research shows that driving after being awake for extended periods produces impairment comparable to intoxication. In a Texas truck accident case, evidence that a driver had exceeded HOS limits — establishing extreme fatigue — can support a claim for gross negligence and potentially punitive damages, particularly if the carrier was aware of the driver’s condition and allowed them to continue driving.

What if the trucking company says the driver was within their HOS limits?

The trucking company’s own records are not the only source of truth. Cross-referencing ELD data with GPS records, fuel receipts, toll records, delivery receipts, and dispatch communications often reveals inconsistencies. Your attorney can also obtain ELD data directly from the third-party ELD service provider through subpoena, independent of whatever records the carrier chooses to provide.

For a free consultation, contact Chris Sanchez at The Relentless Lawyer at therelentlesslawyer.com or call our McAllen office.