A truck crash case is usually won or lost in the paperwork, and most of that paperwork has a short shelf life. Federal rules require a motor carrier to keep drivers records of duty status for only six months. Electronic control module data can be overwritten by continued operation of the tractor. Dispatch messages, load tenders and pre-trip inspection reports live on systems that purge on their own schedules. By the time an injured person finishes their first round of surgeries, the documents that would have shown a fatigued driver on an illegal fourteenth hour may simply be gone.
That is why the federal safety regulations matter to victims and not just to compliance officers. Every one of them creates a record, and every record is a chance to prove what actually happened. It is also why a Houston truck accident lawyer or any experienced trucking attorney sends a spoliation letter within days rather than weeks — once a carrier is on written notice, destroying those records carries consequences of its own.
The rules below are the ones that generate usable proof. Knowing what they require tells you what to ask for, and knowing the retention periods tells you how long you have to ask.
Which Rules Apply, and to Whom
The Federal Motor Carrier Safety Regulations sit in Title 49 of the Code of Federal Regulations, roughly Parts 350 through 399, and they govern interstate commercial motor vehicles — broadly, vehicles over 10,001 pounds, vehicles carrying placarded hazardous materials, and buses above certain passenger counts. Most states have adopted the same rules for purely intrastate carriers, sometimes with modifications, so a local delivery tractor in Houston or Fremont is very often subject to the same standards as a coast-to-coast carrier.
Two other facts shape the value of a claim. Interstate carriers hauling general freight must carry minimum liability insurance of $750,000, and carriers hauling oil or hazardous materials carry $1 million or $5 million depending on the substance. And the regulations define employee broadly enough to include most owner-operators driving under a carrier operating authority, which is why the standard defense that the driver was an independent contractor rarely works as cleanly as carriers hope.
Hours of Service and the Electronic Trail
Fatigue rules in Part 395 are the most litigated part of the regulations, and since the electronic logging device mandate took effect they are also the most verifiable. An ELD records duty status automatically from engine data, which makes the old practice of keeping a second paper logbook far harder to sustain.
| Limit | What it requires | Why it matters after a crash |
|---|---|---|
| 11-hour driving limit | No more than 11 hours driving after 10 consecutive hours off duty | Driving in hour 12 or beyond is a clear violation with an objective time stamp |
| 14-hour window | No driving beyond the 14th consecutive hour after coming on duty | Loading delays often push drivers past this line, and dispatch records show the pressure |
| 30-minute break | A break after 8 cumulative hours of driving time | Skipped breaks establish a pattern of schedule pressure |
| 60 or 70-hour limit | 60 hours in 7 days or 70 hours in 8 consecutive days | Shows whether the driver was near the end of a heavy week |
| 34-hour restart | Optional reset of the weekly total after 34 consecutive hours off | Manipulated restarts are a common area of dispute |
Logs alone rarely tell the whole story, which is why supporting documents matter. Fuel receipts, toll transponder records, weigh station records, bills of lading, GPS pings and dispatch messages can all be compared against the duty status entries. When those sources disagree with the log, the discrepancy becomes powerful evidence of falsification, and falsification is far more damaging to a jury than a routine hours violation.
The Driver Qualification File
Part 391 requires a carrier to build and keep a qualification file on every driver, and the contents of that file are frequently where a direct negligence claim against the company originates. The file should contain the driver commercial license, a current medical examiner certificate, a road test certificate or equivalent, an annual review of the motor vehicle record, and a three-year employment history that includes safety performance and drug and alcohol testing information from previous employers.
Carriers must also query the FMCSA Drug and Alcohol Clearinghouse before hiring and annually thereafter. When a carrier skips those checks and hires a driver with a recent positive test or a string of preventable crashes, the claim is no longer only that the driver was careless on the day. It is that the company put a known risk on the road, which supports negligent hiring, retention and supervision theories and, in some states, opens the door to punitive damages.
Inspection and Maintenance Records
Part 396 requires systematic inspection, repair and maintenance of every vehicle a carrier controls, along with records showing it happened. Drivers must complete a driver vehicle inspection report at the end of each day covering brakes, steering, lighting, tires, coupling devices and emergency equipment, and any defect reported must be repaired and certified before the vehicle goes back out. Vehicles also need a documented annual inspection.
Brake violations dominate roadside enforcement, and they matter because stopping distance is the physical fact most crash reconstructions turn on. A loaded tractor-trailer traveling at highway speed needs substantially more distance to stop than a passenger car, and out-of-adjustment brakes on even a few axles lengthen that distance measurably. When a maintenance file shows a defect reported by a driver and never repaired, the causal chain from paperwork to impact becomes very short.
Cargo Securement and Weight
Securement standards in Part 393 are specific enough to test against physical evidence at the scene. Two requirements come up constantly:
- The aggregate working load limit of the tiedowns must be at least half the weight of the cargo being secured.
- Articles must generally have at least one tiedown for every ten feet of length, with a minimum of two for longer items, and blocking or bracing where the load can shift forward.
- Loads must be immobilized or secured so they cannot shift, leak, blow off or fall from the vehicle.
- Specific commodities — logs, metal coils, concrete pipe, crushed vehicles, heavy machinery, boulders — have their own detailed rules rather than the general standard.
Weight limits interact with all of this. The federal interstate maximum is 80,000 pounds gross, with 20,000 pounds on a single axle and 34,000 on a tandem, subject to the federal bridge formula. An overloaded trailer changes braking distance, rollover threshold and tire failure risk simultaneously, and scale tickets or bills of lading usually establish the actual weight without the need for expert opinion.
Post-Crash Drug and Alcohol Testing
Part 382 requires testing after certain crashes, and the timing requirements are strict: an alcohol test should be conducted within eight hours and a controlled substances test within thirty-two hours. Testing is required when there is a fatality, and also when the driver receives a citation and the crash involved either an injury treated away from the scene or a vehicle towed from the scene.
The absence of a test is itself informative. If a carrier cannot produce results and cannot document why testing was not required, that gap becomes an issue in discovery. Carriers must also keep records explaining any decision not to test, so the question of what the company did in the hours after the crash is answerable from documents rather than testimony alone.
How a Violation Becomes Proof of Negligence
A regulatory violation does not automatically equal liability, and the legal mechanism varies by state. Some states treat violation of a safety statute as negligence per se, meaning the violation establishes the breach of duty and leaves only causation and damages to prove. Others treat it as evidence of negligence that a jury may weigh alongside everything else. Either way, a documented violation converts an argument about who was driving carelessly into a comparison between what the rules required and what the records show.
Comparative fault still applies. In Texas, for example, an injured plaintiff who is found more than 50 percent responsible recovers nothing, and the two-year limitations period for personal injury runs from the date of the crash. California and most other states apply their own variations. This is why establishing violations early matters so much: it shifts the fault allocation before an insurer has anchored to its own version.
Claims against the carrier itself
Beyond vicarious liability for the driver, regulation-based facts support direct claims against the company: negligent hiring, negligent retention, negligent supervision, negligent maintenance, and negligent entrustment. These matter because they reach corporate conduct, they survive some arguments that defeat vicarious liability, and they justify discovery into safety history, compensation structures and dispatch practices that a simple driver negligence claim would not.
The First Thirty Days: What to Demand and When
Retention periods are the reason speed matters. A preservation letter should go out immediately and should be specific, because a general request to preserve everything is easy to satisfy narrowly. A practical list:
- Records of duty status, ELD data in native format, and all supporting documents for the trip and the preceding month.
- Engine control module and event data recorder downloads, with the tractor and trailer preserved and not returned to service before inspection.
- The complete driver qualification file, including prior employer safety performance responses and Clearinghouse query results.
- Maintenance files, driver vehicle inspection reports, repair orders and annual inspection certificates for both tractor and trailer.
- Dispatch records, load tenders, bills of lading, scale tickets, GPS and telematics data, and in-cab camera footage.
- Post-crash drug and alcohol testing records, or documentation of the decision not to test.
- Any lease agreement between the carrier and an owner-operator, plus the carrier insurance filings and safety rating history.
Public sources fill gaps while the formal requests are pending. The FMCSA maintains carrier census and safety data, including inspection and crash history, that can be reviewed by anyone with the company DOT number. It will not prove your case, but it will tell you whether the carrier has a pattern.
Frequently Asked Questions
How long does a trucking company have to keep the driver logs?
Records of duty status and their supporting documents must be retained for six months under federal rules. That is the shortest meaningful clock in a truck crash case. Other records have different periods, and some telematics data is overwritten far sooner. Sending a written preservation demand early converts a routine retention schedule into a legal obligation to hold the material.
Does a violation of federal trucking rules automatically win my case?
No. Depending on the state, a violation may be treated as negligence per se or as evidence of negligence, and you must still prove that the violation caused your injuries and what those injuries are worth. A driver over the 11-hour limit still has to be connected to the crash mechanism. In practice, though, documented violations move settlement values substantially.
Can I sue the trucking company, or only the driver?
Usually both. Carriers are generally responsible for the conduct of drivers operating under their authority, including many owner-operators, and they can also be sued directly for negligent hiring, retention, supervision, maintenance or entrustment. Direct claims against the company often matter more than the claim against the driver, because they reach corporate decisions and larger insurance coverage.
What if the crash was partly my fault?
You may still recover in most states, with your damages reduced by your share of fault. The cutoff varies: some states bar recovery at 50 percent, others at 51 percent, and a small number bar it at any fault at all. Because carriers routinely argue comparative fault, preserving scene evidence and independent witness accounts is important even when liability seems obvious.
What should I do if the truck was already repaired or sold?
Tell your attorney immediately, because loss of evidence after notice can itself become a claim. Courts can impose spoliation sanctions ranging from an adverse inference instruction to exclusion of the defense expert testimony that relied on the destroyed item. Photographs, repair invoices and salvage records can also reconstruct much of what the vehicle itself would have shown.
Do these rules apply to a local delivery truck?
Often yes. Federal rules apply to interstate operation of vehicles over 10,001 pounds and to placarded hazardous materials loads, and most states have adopted equivalent standards for intrastate carriers. Some exemptions exist for short-radius operations, particularly around logging requirements. Whether a specific truck was covered is a question of the vehicle weight, the cargo and the operating authority, not the length of the trip.
What to Do Next
If you were hit by a commercial truck in the last few weeks, the single highest-value action is a written, itemized preservation demand sent to the carrier and its insurer naming the ELD data, the ECM download and the vehicles themselves. Everything else in the case can be rebuilt later; those cannot. Step-by-step guidance on the immediate aftermath is set out in Legal Steps After a Semi Truck Accident in Fremont CA, and related coverage sits in our Accidents Law section.
This article is general information about federal motor carrier regulations and is not legal advice for your particular situation.
