The End of Paper Logs
For decades, truck drivers were required to keep handwritten paper logs tracking their hours of service — and for decades, dishonest drivers and carriers falsified them. Known in the industry as "comic books," paper logs were easy to manipulate, leaving injured victims with little hard evidence of driver fatigue. That changed on December 18, 2017, when the Federal Motor Carrier Safety Administration mandated Electronic Logging Devices (ELDs) for most commercial motor vehicles. This single regulatory change has transformed how commercial motor vehicle collision cases are investigated and litigated.
Why ELDs Cannot Be Manipulated
Unlike paper logs, ELDs are directly synced to a vehicle's engine control module. They automatically record when the engine is running, vehicle movement, miles driven, and engine hours. Because the data is generated by the vehicle itself — not entered by hand — it cannot be retroactively altered without detection. Timestamps are locked. GPS coordinates are embedded. Any attempt to tamper with the data leaves an electronic trail. This means that when a crash occurs, the ELD record becomes one of the most powerful pieces of evidence in a personal injury case.
Hours of Service: Why They Exist and Why They Matter
Federal hours-of-service (HOS) regulations exist for one reason: to keep fatigued drivers off the road. Research consistently shows that driving after 18 hours without sleep is equivalent to driving with a blood alcohol content of 0.08% — legally drunk in most states. Under federal regulations, most commercial drivers may not drive more than 11 hours after 10 consecutive hours off duty, and may not remain on duty for more than 14 hours following 10 hours off. ELD data reveals exactly when these limits were exceeded — and in Oklahoma truck crash cases, HOS violations are often central to proving a driver's negligence.
What ELD Evidence Reveals
In litigation, ELD data can prove:
• Whether the driver had been on duty for too many consecutive hours before the crash
• Whether required rest breaks were skipped or shortened
• Whether the vehicle was moving at unsafe speeds
• Whether the carrier was aware of ongoing HOS violations and ignored them
Combined with dispatch records, GPS data, and fuel receipts, ELD evidence builds a clear picture of what a trucking company knew and when they knew it.
Act Fast: ELD Data Can Disappear
Federal regulations only require carriers to retain ELD data for six months. After a crash, carriers and their insurers move quickly to preserve evidence that helps them — and potentially destroy or lose evidence that doesn't. An experienced attorney can issue litigation holds and send preservation letters immediately, protecting this critical evidence before it is gone.
If someone you love was seriously injured in a truck crash in Oklahoma, do not wait. Contact Bison Law Firm today at (405) 367-8710 or visit BisonLawFirm.com. Our attorneys know how to find and use ELD evidence to hold negligent carriers accountable.