What does ELD stand for?

Electronic logging device. It's the device that replaced paper logbooks for most commercial truck drivers when the federal ELD rule took effect, with full compliance required by December 2019.

How does an ELD work?

It connects to the truck's engine to read motion, miles and engine hours. When the truck moves, it records driving automatically. The driver logs in and selects the other statuses: off duty, sleeper berth, and on duty not driving. Location is stamped at each change.

What is the best ELD?

There isn't one best ELD for everyone, and we don't rank them. Choose a device on FMCSA's registered list that transfers data reliably at roadside, works with your equipment, and has support you can reach. Check that it isn't on FMCSA's revoked list.

Do I need an ELD for a non-CDL truck?

Often, yes. The ELD rule follows the logbook rule, not the CDL. If your truck is a commercial motor vehicle in interstate commerce and you must keep logs, you generally need an ELD, unless an exception such as short-haul or an older engine applies.

Can I edit my ELD logs?

You can correct non-driving time with a note explaining the change, but you can't shorten or delete driving time recorded from the engine. Carrier edits need your approval, and the original record is kept. Editing to hide hours is log falsification.

What happens if my ELD stops working?

Note the malfunction, tell your carrier in writing within 24 hours, reconstruct the current day and previous 7 days on paper, and keep paper logs until it's fixed. The carrier has 8 days to repair or replace it (49 CFR 395.34).

ELD (electronic logging device) explained

BY JEFF BYRD· FACTS CHECKED 2026-10-06· UPDATED October 2026· HOW WE CHECK

QUICK ANSWER

An ELD, or electronic logging device, is a unit connected to a truck's engine that automatically records driving time and keeps the driver's record of duty status for hours of service. Most drivers who must keep logs are required to use one, and it must be a device registered with FMCSA (49 CFR 395.8(a), 395.22(a)).

RATE CON · 06:00

ELD · DRIVER A

DRIVE 7:40 LEFT

LOGGED IN

EXAMPLE

BOARD 01WHAT IT IS

What ELD stands for, and what it does

ELD stands for electronic logging device. In trucking it replaced the paper logbook for most drivers: instead of drawing lines on a grid, the driver's duty status is recorded electronically, and driving time is captured straight from the engine so it can't be guessed or rounded.

The ELD doesn't set your limits; the hours of service rules do. What it does is keep an accurate record of how you spent each day so you, your carrier and an inspector can see how much time you have left on your 11-hour, 14-hour and 60/70-hour clocks.

BOARD 02HOW IT WORKS

How an ELD works on a real shift

Try the drawn ELD screen below. Pick a duty status the way a driver would. Notice that driving isn't a button you press: the device switches to driving on its own once the truck moves.

DRIVER A · TRUCK 1205:30

CURRENT STATUS

ON DUTY

SELECTED BY DRIVER

05:30 ONMemphis, TN

EXAMPLE · ILLUSTRATION, NOT A REAL DEVICE

Move the truck

Pick off duty, sleeper or on duty. Driving can't be chosen by hand; press 'Truck starts moving' to see how it's recorded.

After a stop with no driver response, the ELD changes to on duty not driving by itself. Then the driver can pick the right status.

From the engine

Engine power on and off, vehicle motion, miles and engine hours, read through the engine connection.

Automatically

Driving status once the truck reaches no more than 5 mph, and location at each status change and periodically while driving.

From the driver

Off duty, sleeper berth and on duty not driving, plus notes such as the reason for a stop or an edit.

Identity

Each driver logs in with their own account, so time is tied to the right person and the right truck.

When the truck stops for a while in driving status, the ELD prompts the driver to pick a new status. If the driver doesn't respond, it changes to on duty not driving by itself, so a forgotten status doesn't keep counting as driving.

BOARD 03A DAY ON THE ELD

One EXAMPLE day, as the ELD records it

Driver A logs in at 05:30 and selects on duty for a pre-trip. At 06:00 the truck pulls out and the ELD switches to driving on its own. At a 09:45 fuel stop the driver picks on duty not driving; the location is stamped automatically. After two more driving stretches and a 30-minute off-duty break, Driver A arrives at the receiver, records the unload as on duty, and goes off duty at 16:30. The driver chose four statuses; the engine supplied every minute of driving.

EXAMPLE · DRIVER ADriver A: 8.5 h driving, recorded from the engine; four statuses chosen by the driver.checked 2026-10-05

BOARD 04WHO NEEDS ONE

Who needs an ELD, and who doesn't

ELD REQUIRED

If you're required to keep records of duty status under 49 CFR 395.8, the default is an ELD. That covers most interstate drivers of commercial motor vehicles over 10,000 lb, with or without a CDL. Drivers who stay inside one state follow that state's rules, and many states, California among them, now require ELDs for intrastate carriers too.

49 CFR 395.8(a)(1) · checked 2026-10-06

These drivers may use paper logs or time records instead (49 CFR 395.8(a)(1)(iii) and 395.1(e)):

8 days in 30

Drivers who use paper RODS no more than 8 days in any rolling 30-day period

Driveaway-towaway

Driveaway-towaway operations where the vehicle driven is the commodity

Pre-2000 engine

Vehicles with engines older than model year 2000

Short-haul

Short-haul drivers using the 150 air-mile time-record exception

BOARD 05TIMELINE

From paper logs to ELDs

BEFORE 2017
Paper logbooks, drawn by hand on a 24-hour grid. Some fleets used early electronic recorders called AOBRDs.
DEC 18, 2017
The ELD rule took effect. Drivers who had to keep logs needed an ELD, unless their carrier already used an AOBRD.
DEC 16, 2019
The AOBRD grandfather period ended. Since then, an ELD on FMCSA's registered list is the standard for logged drivers.
JUL 22, 2026
The ELD user's manual no longer has to be kept in the truck. The rest of the rule is unchanged.

BOARD 06SUPPORTING DOCUMENTS

Supporting documents sit beside the ELD

The ELD isn't the only record. Drivers turn in supporting documents to their carrier within 13 days: bills of lading or itineraries, dispatch or trip records, receipts for on-duty stops such as fuel, fleet messaging records, and payroll or settlement records (49 CFR 395.11). A carrier keeps up to 8 of them for each driver's 24-hour period, along with the logs. Inspectors and auditors compare them with the ELD, so a fuel receipt timed while the log says off duty raises questions.

BOL
TRIP
RECEIPT
MESSAGES
PAY

BOARD 07EDITS

What can be edited on an ELD

Mistakes happen, so the rules allow edits with limits (49 CFR 395.30). A driver can correct non-driving statuses, such as an on-duty period that should have been off duty, but must add a note explaining why. Driving time recorded automatically from the engine can't be shortened or deleted. A carrier can propose an edit, but the driver has to approve it, and the ELD keeps the original record either way, so an inspector can see what changed and who changed it.

49 CFR 395.30 · checked 2026-10-06

Correct an on-duty period to off duty, with a note

Accept or reject an edit your carrier proposes

Shorten or delete driving recorded from the engine

Erase the original record

BOARD 08MALFUNCTIONS

When the ELD malfunctions

1Note itRecord the malfunction and give your carrier written notice within 24 hours.
2ReconstructRebuild your logs for the current 24 hours and the previous 7 days on paper graph-grids.
3Keep loggingContinue paper logs until the ELD is repaired or replaced.
4Carrier fixes itThe carrier has 8 days to repair or replace it, or must ask FMCSA for more time.

49 CFR 395.34 · checked 2026-10-06

BOARD 09IN THE CAB

What has to be in the cab

An instruction sheet on how to transfer ELD data to an inspector
An instruction sheet on what to do when the ELD malfunctions
Blank paper graph-grid logs for at least 8 days

What changed in 2026: FMCSA removed the requirement to keep a copy of the ELD user's manual in the truck, effective July 22, 2026. The two instruction sheets and the blank logs are still required.

49 CFR 395.22(h) · checked 2026-10-06

BOARD 10ROADSIDE

What happens at a roadside inspection

The inspector asks to see your records of duty status for today and the previous 7 days. You can show them on the ELD screen or a printout, and the inspector may ask you to transfer the data electronically, usually through the device's web or email transfer, so they can review it on their own system. Know how your device does this before you need it; the instruction sheet in the cab is there for that moment.

BOARD 11CHOOSING

Is there a best ELD?

We don't rank ELDs, and we're not affiliated with any provider. The right one is the one that's on FMCSA's registered list, transfers data reliably at roadside, works with your trucks and phone or tablet, and has support you can reach at night. Check the registered and revoked lists on FMCSA's ELD site before you buy, because a revoked device has to be replaced. Ask about the monthly cost per truck, the contract length, and whether you keep the hardware if you switch providers.

Your ELD records the day; a dispatcher can shape it

The hours on your ELD are the hours a dispatcher has to work with. Ours plan loads to fit the time you actually have, so pickups land after your 10-hour break and deliveries land before your window closes. We never need your ELD login, and every load reaches you as a rate confirmation you can turn down. If a load won't fit your clock, we say so before you have to.

Truck dispatch planned around your hours · Owner-operator dispatch

Apply for dispatch

BOARD 12FAQ

An ELD is an electronic logging device: a unit synced with the truck's engine that records driving time automatically and keeps the driver's hours of service log. Drivers who must keep logs generally have to use a device registered with FMCSA instead of a paper logbook.

General information, not legal advice. We are not affiliated with FMCSA or any ELD provider.