ELD and Hours-of-Service Violations in Truck Accidents: Using Electronic Logs as Evidence in 2025

The Electronic Logging Device Mandate Changed Everything

Before 2017, truck drivers maintained paper logs that were notoriously easy to falsify. The FMCSA's ELD mandate, fully enforced since 2019, requires most commercial motor vehicles to use tamper-resistant electronic logging devices that automatically record driving time, engine hours, vehicle motion, and miles driven. For injury victims, this data is a powerful tool — it can prove a driver violated federal hours-of-service (HOS) limits, showing the carrier sent a fatigued driver onto the road.

What Hours-of-Service Rules Say

FMCSA's HOS regulations under 49 CFR Part 395 set maximum driving limits:

• **11-hour driving limit** — drivers may not drive more than 11 cumulative hours after 10 consecutive hours off duty
• **14-hour window** — a driver may not drive beyond the 14th hour after coming on duty following 10 hours off
• **30-minute break rule** — drivers must take a 30-minute break after 8 hours of continuous driving
• **60/70-hour limit** — drivers may not exceed 60 hours on duty in 7 consecutive days (or 70 hours in 8 days)
• **Sleeper berth provisions** — specific rules govern how time in a sleeper berth is counted toward rest

A violation of any of these rules at the time of a crash is powerful evidence of negligence — and often supports a negligence per se theory under FMCSA regulations.

What ELD Data Actually Contains

Modern ELDs record far more than raw hours. The data extract typically includes:

• **Engine power-on/off timestamps** with GPS coordinates
• **Vehicle speed at regular intervals**
• **Driving vs. on-duty (not driving) status**
• **Unassigned driving events** — periods of movement not attributed to a logged-in driver (common in log falsification schemes)
• **Driver login/logout records**
• **Diagnostic and malfunction events** — including instances where the ELD itself was tampered with

How to Obtain ELD Records After a Crash

ELD data is stored on the device (typically retained 6 months) and sometimes on the carrier's server. The process:

1. **Send a litigation hold letter immediately** — carriers are required to maintain records for 6 months, but may delete sooner absent a legal hold. Your attorney should send this within days of the crash.
2. **Subpoena the ELD manufacturer** — companies like Samsara, Omnitracs, KeepTruckin (Motive), and Verizon Connect hold carrier data in the cloud. A subpoena to the manufacturer can recover data even if the carrier claims it no longer exists.
3. **Request FMCSA roadside inspection records** — if the driver was recently inspected, the inspection report shows any HOS violations noted by the inspecting officer.
4. **Obtain the driver qualification file** — carriers must maintain a DQ file including the driver's past 3 years of employment and driving record. A history of prior HOS violations shows a systemic pattern.

Reading the ELD Data: What to Look For

Your attorney will work with a commercial trucking expert to analyze the records. Key red flags include:

• **Driving time within the last 24 hours approaching or exceeding 11 hours** before the crash
• **Gaps in the log** where the vehicle was moving but no driver was logged in (suggesting log manipulation)
• **Short off-duty periods** that do not meet the 10-consecutive-hour reset requirement
• **On-duty-not-driving time that was excessive** before the driving shift, narrowing the available driving window
• **Multiple driver accounts on one vehicle** in patterns inconsistent with legitimate team driving

Carrier Liability for HOS Violations

Carriers who dispatch drivers knowing they are in or near violation face both federal regulatory penalties and civil liability. In cases where internal communications show dispatchers pressured drivers to continue driving past legal limits, courts have awarded punitive damages. This "dispatch pressure" evidence often comes from driver text messages, dispatch software logs, and driver testimony.

The Broader Fatigue Picture

ELD data proves legal violations, but your attorney may also retain a fatigue science expert to explain the crash risk. Studies show that a driver who has been awake for 18 hours performs similarly to someone with a 0.08% blood alcohol level. Expert testimony on fatigue biomechanics can powerfully complement the raw ELD evidence in front of a jury.

Do Not Wait

ELD data availability is time-limited. Once six months pass — and sometimes sooner if no hold is in place — the data may be gone. If a truck driver's fatigue contributed to your crash, the most important step is contacting a truck accident attorney immediately to secure the electronic records before they disappear.