ELD vs AOBRD vs Paper Logs: Key Differences
Rules, prices and device details on this page were checked October 2026 against the official sources listed at the bottom. Where a provider doesn't publish a number, we say so instead of guessing.
If you started driving after 2019, you may have never seen an AOBRD. But the term still shows up in old fleet policies, used truck listings and roadside conversations. Here's a clear comparison of the three ways drivers have logged hours, what each one records, and which you're allowed to use today. Rules were checked October 2026.
Definitions
- Paper logs. The traditional grid where a driver records each duty status change by hand under 49 CFR 395.8.
- AOBRD. An automatic onboard recording device under the 1988 rule at 49 CFR 395.15. It tied into the truck to record driving time, but the technical requirements were loose.
- ELD. An electronic logging device that meets the technical specifications in Part 395, Subpart B and is registered with FMCSA. Required for most drivers who must keep logs.
Technical Requirements
FMCSA published a side by side comparison of the AOBRD and ELD rules. Here are the differences that matter most.
| Feature | Paper logs | AOBRD (1988 rule) | ELD |
|---|---|---|---|
| Engine connection | None | "Integral synchronization" required but not defined | Must connect to the engine control module to capture engine power, motion, miles and engine hours (pre 2000 engines exempt) |
| Location | Written by driver | At each duty change, manual or automatic | Automatic at each duty change, every 60 minutes while moving, at engine on and off, and at start and end of personal use and yard moves |
| Graph grid | Yes, drawn by hand | Not required | Required on screen or printout |
| Unassigned driving | Not applicable | Not addressed | Warning required at login |
| Default duty status | Not applicable | Not addressed | Switches to on duty not driving after 5 minutes stopped if the driver doesn't respond within 1 minute |
| Clock | Driver's watch | Not addressed | Synced to UTC, never more than 10 minutes off |
| Data transfer | Hand the logbook over | Not standardized | Telematics or local transfer to safety officials |
Engine sync
This is the big one. An AOBRD only had to be "integrally synchronized" with the engine, and the old rule never defined what that meant. An ELD has to read specific data from the engine computer. That's what makes driving time automatic and much harder to fudge.
Edits and annotations
On paper, a driver could erase and rewrite. AOBRD edit rules varied by vendor. With an ELD, the original record is kept even after an edit, and every change needs an annotation explaining why. Drivers can see and approve or reject edits proposed by the carrier. Driving time recorded automatically can't be shortened by an edit.
Current Legal Status
| Method | Status in 2026 |
|---|---|
| ELD | Required for most drivers who must keep records of duty status |
| AOBRD | Not allowed. Grandfathering ended December 16, 2019 |
| Paper logs | Allowed only under exceptions, or temporarily during an ELD malfunction |
Grandfathering ended
FMCSA phased in the ELD rule in three steps. Carriers that had installed AOBRDs before December 18, 2017 were allowed to keep using them until December 16, 2019. After that date, every carrier and driver subject to the rule had to use a registered ELD. If you see a used truck advertised with an "AOBRD," that device can't be used for logging today.
Data Captured
An ELD records a lot more than a paper log. At minimum, each record includes date, time, location, engine hours, vehicle miles, and identification for the driver, the vehicle and the carrier. It also records events like logins, malfunctions and diagnostic events. That's why roadside officers can review a driver's day in minutes, and why mistakes like unassigned driving are so visible.
Which Applies to You
Here's a simple way to figure it out.
- Do you need to keep logs at all? Drivers who qualify for the short haul exception don't keep logs, so they don't need any of the three. See our short haul exemption guide.
- Do you need logs on 8 or fewer days in any 30 day period? You can use paper logs.
- Is your engine older than model year 2000? You can use paper logs.
- Are you in driveaway towaway operations, where the vehicle you're driving is the commodity? Paper logs are allowed in most cases.
- Is your ELD malfunctioning? Switch to paper and follow the malfunction rules. See our ELD malfunction guide.
- Everyone else who must keep logs needs a registered ELD.
Full details on the exceptions are in our ELD exemptions guide, and the background on the rule is in our ELD mandate guide.
Common Myths
"My AOBRD is grandfathered." Not anymore. That ended December 16, 2019. "Any app counts as an ELD." Only devices on the FMCSA registry, connected to the engine, count. Check the list before you buy.
Bottom Line
AOBRDs are history. Paper logs live on only for drivers who qualify for an exception or as a short term backup during a malfunction. For everyone else, it's an ELD. If you're still holding an old AOBRD policy in your driver handbook, now's a good time to update it.
Frequently Asked Questions
Can I still use an AOBRD?
No. The grandfather period ended December 16, 2019. Drivers subject to the ELD rule must use a registered ELD.
When can I use paper logs?
When you need logs on 8 or fewer days in any 30 day period, when your engine is older than model year 2000, in most driveaway towaway operations, or temporarily during an ELD malfunction.
What is the biggest difference between an AOBRD and an ELD?
An ELD must connect to the engine control module and record specific data automatically. The AOBRD rule never defined that connection.
Do ELDs keep the original record after an edit?
Yes. The original is kept, and every edit must include an annotation.
Sources
All prices, terms and registration details were checked October 2026 on the pages below. Providers change pricing often, so confirm before you buy.