A truck’s electronic log can show when the driver recorded driving, other work, sleeper-berth time, and time off duty. It cannot tell you whether the driver actually slept or was alert at the moment of a collision. In a Louisiana truck crash investigation, an electronic logging device, or ELD, supplies part of the work timeline. That timeline becomes more useful when compared with dispatch messages, delivery records, witness accounts, and available video.
The distinction matters in both directions. A log that stays within the hours limits does not rule out fatigue. A violation of those limits does not automatically establish that fatigue caused the crash.
What the device actually records
FMCSA’s ELD guidance describes automatic recording of dates, times, location information, engine hours, vehicle miles, and driver, vehicle, and carrier identifiers. Location is recorded at specified events and at 60-minute intervals while the vehicle moves. This is not necessarily a continuous, street-level GPS trace.
ELDs are not required to record speed, braking, steering, or other vehicle-performance measurements. Some commercial platforms offer additional features, but those should be identified separately. The truck’s ECM and other electronic systems may contain different evidence about vehicle operation. Asking for the ELD alone may leave those sources unaddressed.
FMCSA also explains that location precision is reduced during personal use. An apparent location discrepancy should therefore be checked against the recording mode, time standard, and actual source before someone treats it as evidence of a false statement.
Hours limits are one part of the fatigue inquiry
For property-carrying operations covered by 49 C.F.R. section 395.3, the usual limits include 10 consecutive hours off duty before driving, no more than 11 hours of driving within a 14-hour period after coming on duty, and a 30-minute interruption after eight cumulative driving hours. The interruption can include qualifying on-duty time without driving. Short-haul exceptions affect that break requirement.
The regulation also limits driving after 60 on-duty hours in seven consecutive days or 70 in eight, depending on the carrier’s operation. It permits a qualifying 34-hour restart. Other exceptions and sleeper-berth provisions can change the calculation, so a screenshot of one day’s log is not enough to decide compliance.
A separate rule, section 392.3, prohibits driving, or requiring or permitting driving, when fatigue or another condition impairs or is likely to impair alertness enough to make operation unsafe. It contains a narrow grave-emergency qualification. Staying below the numerical hours limits does not replace that safety obligation.
Work through a disputed period before drawing a conclusion
Suppose an ELD shows an off-duty interval at a warehouse before an overnight trip. A dispatch message during that interval says the driver is helping load the trailer. That discrepancy warrants investigation, but it does not answer every question. Was the message accurate? Did it refer to this driver and load? When did the work begin and end? Was the timestamp displayed in the same time zone as the log?
Section 395.8 uses the driver’s home-terminal time standard for duty-status records. A receipt or camera system may use a different time basis. Preserve the original timestamps and document any conversion when building a common timeline.
The most useful comparisons depend on the disputed event:
- A loading or unloading interval can be compared with warehouse check-in records, shipment documents, and dispatch messages.
- A driving interval can be compared with toll records, fuel receipts, vehicle identifiers, and other available location data.
- A disputed change of driver can be compared with both drivers’ records and the trip assignment.
- A claim that the driver reported being too tired to continue can be compared with the original message, its recipient, and the response.
Under section 395.11, supporting-document categories include shipping documents, dispatch records, certain expense receipts, fleet communications, and payroll or settlement records. The regulation’s document limits and required identifying information also matter. These records help test the log; they do not make every unexplained gap proof of fatigue.
If messages suggest that a carrier knew of an unsafe condition and continued assigning work, the investigation may extend to its own decisions. The article on negligent hiring, retention, and supervision explains why notice and the company’s response must be connected to the collision.
An edited log needs explanation, not an automatic accusation
ELD records can be corrected. Section 395.30 requires drivers to review, correct, and certify their records. Changes require annotations. Carrier-proposed changes require the driver’s confirmation or rejection and the appropriate recertification. The rule also prohibits alteration or erasure of the original hours information and source data.
Request the original events, later changes, annotations, certifications, and explanations for any unassigned driving that affects the trip. An edit may correct a genuine error. Its timing and explanation should be evaluated against the other records. A final daily graph can conceal that sequence simply because it is a summary, even without any misconduct.
Preserve the export and the records needed to interpret it
Section 395.8(k) requires carriers to retain duty-status records and required supporting documents for at least six months from receipt. Section 395.22(i) separately requires a six-month backup of ELD records on a different device.
Those retention rules are a baseline, not a reason to wait. A preservation request should identify the driver, vehicle, crash date, relevant earlier work period, ELD provider, and requested electronic formats. It should address event history, edits, annotations, driver certifications, relevant unidentified-driver records, and supporting documents. Related camera footage and telematics data may have different retention practices and need their own requests.
Keeping an original export allows an analyst to examine details that may not appear on a printout. The provider’s field definitions and time settings may also be necessary. A readable copy helps explain the results, but it should not replace the underlying data.
The production rules for an authorized safety official are not an automatic deadline for responding to an injured person’s request. Civil access may require formal discovery, an agreed inspection, or a court order. If data are missing, counsel must examine the applicable preservation duties and circumstances; an adverse inference or other sanction is not automatic.
Keep the evidence deadline separate from the lawsuit deadline
Louisiana’s general negligence framework under Civil Code article 2315 still requires a connection between fault and injury. ELD evidence may support or weaken a fatigue theory. Crash reconstruction, witness testimony, and medical evidence address other parts of the claim.
Article 3493.1 generally provides two years from injury or damage for ordinary negligence claims under the law effective July 1, 2024. Older claims generally remain under the former one-year rule. Government claims and other exceptions require separate analysis, and a child’s involvement does not automatically suspend the deadline.
The comparative-fault amendment to article 2323, effective January 1, 2026, bars recovery at 51 percent or more negligence by the injured person and reduces damages proportionately below that threshold, with a separate rule for harm involving an intentional tortfeasor. The crash date and applicable law need to be checked before evaluating any allocation of fault.
If fatigue may have contributed to your collision, a Louisiana truck accident lawyer can identify which records to request. The carrier’s name, truck number, location, and approximate crash time help locate the trip. You do not need to obtain or interpret the ELD file yourself before seeking help.
Sources checked: September 29, 2026. Last reviewed: September 28, 2026.