Hours of Service Guide
FMCSA Hours of Service regulations for property-carrying and passenger-carrying CMV operations: driving limits, on-duty windows, off-duty requirements, and weekly on-duty caps.
ELD device requirements under 49 CFR Part 395: what makes a device FMCSA-compliant, where to find the registered device list at eld.fmcsa.dot.gov, and why only the listed identifier controls.
An ELD (Electronic Logging Device) is an FMCSA-mandated device installed in a commercial motor vehicle that automatically records engine activity, driving time, and duty status data for Hours of Service compliance — the device must be on FMCSA's registered compliant device list to satisfy the ELD mandate. If a device fails, see the malfunction procedures.
ELD questions often lead directly into Hours of Service limits, malfunction procedures, and driver responsibilities. Hours of Service, ELD Malfunction, Driver Responsibilities.
Use for ELD overview and official registered-device reference prompts.
Use as the primary regulatory reference for HOS and ELD pages.
FMCSA Hours of Service regulations for property-carrying and passenger-carrying CMV operations: driving limits, on-duty windows, off-duty requirements, and weekly on-duty caps.
ELD malfunction response steps for drivers and carriers, including paper logs, notification timing, repair windows, and records.
Check the FMCSA registered ELD device list at eld.fmcsa.dot.gov — only devices on that list satisfy the ELD mandate. Do not rely on a vendor's claim of compliance alone; verify the device by its make, model, and identifier against the official list before installation.
No. Only devices listed on FMCSA's registered ELD product list at eld.fmcsa.dot.gov satisfy the mandate. A device that connects to the engine but is not on that list does not comply. Verify the specific make and model against the current registry before purchase or deployment.
No. ELD data is stored on the device and transferred on request — to roadside inspectors via USB, Bluetooth, or telematics during inspections, or to FMCSA during compliance investigations. FMCSA does not maintain a continuous live feed of individual driver logs.