ELD Compliance: What Carriers and Drivers Need to Know

Electronic logging devices have been part of everyday trucking operations for years now, but ELD compliance is still one of the more misunderstood areas of the regulations — partly because responsibility for it is split between carriers and drivers, and the two sides don't always know exactly where their part starts and ends.

What an ELD Actually Does

An ELD automatically records a driver's duty status, driving time, vehicle movement, engine hours, and location data, and syncs that information to the vehicle's engine to verify it's accurate. The goal is a more reliable record of hours-of-service compliance than a paper log, which relies entirely on manual, after-the-fact entry.

Driver Responsibilities

• Logging in correctly at the start of a shift, and switching duty status accurately throughout the day.
• Reviewing and certifying logs at the end of each 24-hour period.
• Annotating edits whenever a correction is made, with a clear explanation.
• Carrying required documentation — including instructions for the ELD's operation and a way to produce records to an officer during a roadside inspection.
• Reporting malfunctions to the carrier as soon as they're identified.

Carrier Responsibilities

• Ensuring ELDs are properly registered and configured for the carrier's operation.
• Monitoring for and resolving malfunctions reported by drivers.
• Retaining supporting documents that back up the accuracy of driver logs.
• Reviewing driver logs for unidentified driving time, missed certifications, and other data diagnostic events.
• Training drivers on both the mechanics of the ELD and the underlying HOS rules it's recording.

Log Review

An ELD generating accurate data doesn't help much if nobody reviews it. Regular log review — checking for unresolved data diagnostic events, unidentified driving time, and unusual patterns — is where most ELD compliance problems actually get caught, well before they'd surface at roadside or in an audit.

Malfunctions

Under 49 CFR 395.34, an ELD must monitor its own compliance and flag malfunctions and data diagnostic events related to things like power, data recording, positioning, and data transfer. When a malfunction occurs, the driver is required to report it to the carrier, and the carrier is generally required to correct, repair, replace, or service the ELD within a defined window — this is a case where the exact timeframe is worth confirming directly against the current regulation rather than a secondary source, since compliance deadlines like this are exactly the kind of detail that needs to be accurate.

Critically, a malfunction doesn't excuse a driver from HOS compliance. If an ELD malfunctions, the driver generally needs to reconstruct their record of duty status manually for the current 24-hour period and the prior 7 days, using whatever supporting information is available, until the device is back in service.

Supporting Documentation

Even with a fully functioning ELD, carriers are still required to retain certain supporting documents that help verify the accuracy of driver logs — things like bills of lading, dispatch records, and fuel receipts. ELDs replaced paper logs; they didn't eliminate the need for supporting documentation.

Data Transfer

ELDs must be able to transfer HOS data to an authorized safety official during a roadside inspection, either electronically or by display/printout, depending on the device. Drivers should know how to perform this transfer on whatever device their company uses — fumbling through an unfamiliar data transfer process at roadside is a common, avoidable source of friction during an inspection.

Common Operational Mistakes

• Drivers switching duty status incorrectly out of habit rather than understanding the underlying rule.
• Unidentified driving time going unassigned for days or weeks at a time.
• Carriers not having a clear internal process for what happens when a driver reports a malfunction.
• Personal conveyance and yard moves being logged inconsistently across a fleet.
• Drivers not knowing how to complete a data transfer when asked at roadside.

An ELD is only as reliable as the process around it — device accuracy is half the equation, review and response is the other half.

ELD data is one of the more detailed records FMCSA can request during a compliance review, and it connects directly to the broader HOS picture covered in our article on common HOS compliance mistakes. If building a consistent ELD review process across your fleet feels like more than your team can keep up with manually, our compliance services are built for exactly that, and you can get audit ready whenever you're ready.