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Regulatory Guidance

Welcome to the FMCSA Guidance Portal. This web portal is a searchable, indexed database that contains and links to all guidance documents in effect from the Federal Motor Carrier Safety Administration. The guidance documents lack the force and effect of law, unless expressly authorized by statute or incorporated into a contract.

To comment on any guidance document, or to request issuance, reconsideration, modification, or rescission of any guidance document, please identify the guidance document in your request and send it to: FMCSAguidance@dot.gov. NOTE: The FMCSAguidance mailbox is not intended to serve as a mailbox for general inquiries. For inquiries that go beyond the limited purpose of the FMCSAguidance mailbox, please call FMCSA's Information Line (800-832-5660) or visit FMCSA's "Contact Us" page to send your inquiry to the appropriate mailbox.

Subject Agency Identifier Topic Issued Date
When a driver makes an edit, should the original record be visible in the print or display option? FMCSA-HOS-ELD-TECH-395-FAQ62(2017-09-01)-CORR1 ELD Guidance
How should the ELD handle the dashboard odometer display not matching the odometer value returned by the ECM? For instance, when the engine is replaced and the value is not synced. FMCSA-HOS-ELD-TECH-395-FAQ24 Electronic Logging Devices and Hours of Service – Technical Specifications
Why is there a reference to the internet in Bluetooth® transfer when it is part of the local transfer option? FMCSA-HOS-ELD-TECH-395-FAQ79(2017-09-01)-CORR1 ELD Guidance
How should the Time Zone Offset from UTC handle daylight savings time? FMCSA-HOS-ELD-TECH-395-FAQ26-RESCINDED ELD Guidance
Is the electronic logging device (ELD) required to encrypt files during a USB electronic data transfer? FMCSA-HOS-ELD-TECH-395-FAQ80(2017-09-01)-CORR1 ELD Guidance
Can an electronic logging device (ELD) connect to the electronic control module (ECM) in a manner that relies on internet, Bluetooth® or another method of connectivity? FMCSA-HOS-ELD-TECH-395-FAQ82(2017-09-01)-CORR1 ELD Guidance
When an existing record becomes inactive and its replacement record becomes active or inactive‐ change‐requested, is it acceptable that the replacement record has the same sequence ID as the record it replaces? FMCSA-HOS-ELD-TECH-395-FAQ29 Electronic Logging Devices and Hours of Service – Technical Specifications
Is it necessary for drivers to enter their user credentials before starting the data transfer process? FMCSA-HOS-ELD-TECH-395-FAQ69(2017-09-01)-CORR1 ELD Guidance
ELD FAQ 85: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ85 ELD Guidance
When creating an ELD file as specified in Section 4.9.2, when a field specifies activities on a per‐CMV basis (such as engine power‐up and shut‐down activities), which records should be included? FMCSA-HOS-ELD-TECH-395-FAQ30 Electronic Logging Devices and Hours of Service – Technical Specifications