Hours of Service Rules: The Limits, the Exceptions, and Where Fleets Get Caught

Hours of service rules decide how much a truck can legally earn in a week, which makes them a business constraint as much as a safety one. They are also the second most common source of violations in roadside inspections, and almost all of those are avoidable.

This covers the structure of the rules, the exceptions worth knowing, and where carriers actually get caught. Verify the specifics against current FMCSA guidance, because these rules change.

The core limits for property-carrying drivers

The 11-hour driving limit

A driver may drive up to 11 hours after 10 consecutive hours off duty.

The 14-hour window

Driving is not permitted beyond the 14th consecutive hour after coming on duty, following 10 consecutive hours off. This is a window, not a bank. It keeps running whether you are driving, loading, waiting at a dock or eating lunch. Once it closes, it closes.

This is the rule that turns a long detention into lost revenue, because time sitting at a shipper consumes the window without producing a mile.

The 30-minute break

A break is required after a period of driving time, and it must be taken before continuing to drive.

The 60/70-hour limit

A driver may not drive after 60 hours on duty in 7 consecutive days, or 70 hours in 8 consecutive days, depending on whether the fleets operates every day of the week.

The 34-hour restart

The weekly limit can be reset by taking 34 or more consecutive hours off duty.

Sleeper berth and splitting

The sleeper berth provision allows the required off-duty period to be split into two qualifying periods rather than taken in one block, under specific conditions about the length of each part and how they combine.

It is genuinely useful for working around inflexible appointment times, and it is also where a lot of honest mistakes happen, because the arithmetic is not intuitive. Drivers using split sleeper should understand it properly rather than approximately.

Exceptions worth knowing

• Short-haul exception — relief from some requirements for drivers operating within a defined radius and returning to the same location within a set time
• Adverse driving conditions — limited additional driving time when unforeseeable conditions arise, and “unforeseeable” is doing real work in that sentence
• Personal conveyance — off-duty movement of the vehicle for personal reasons, with real limits and a lot of misunderstanding around what qualifies
• Yard moves — on-duty but not driving status within a confined property

Each has conditions. Using one incorrectly is a violation, and “I thought it applied” is not a defence at roadside.

Where fleets actually get caught

Form and manner violations

Not driving over hours, just logs that are incomplete or incorrect. Missing annotations, unassigned driving time, wrong duty status. These are paperwork violations and they count.

Unassigned driving time

Movement recorded by the ELD with no driver attached. It accumulates quietly and it looks bad in an audit. Somebody has to review and assign it, regularly.

Personal conveyance misuse

Using personal conveyance to move toward the next load rather than for genuine personal reasons. Enforcement looks at direction of travel and context.

The 14-hour window, misunderstood

Drivers who believe a break stops the clock. It does not.

Ignoring ELD malfunctions

There are required procedures when a device malfunctions, including paper logs and a repair timeline. Carrying on and hoping is a violation on top of a malfunction.

Why this is a business problem, not only a compliance one

Available hours determine what freight you can accept. A driver with three hours left cannot take a 600-mile load, however good the rate.

Most fleets discover this at the wrong moment: after committing to a load, not before. The hours data lives in the ELD portal, the load decision happens on a load board, and nobody joins the two.

Hey Bubba! is an AI back-office automation platform for fleets. It reads from your connected ELD, so available hours are part of the same system that searches load boards and books freight. It does not offer a load the driver cannot legally run.

Get started with Hey Bubba!, or check whether your ELD is one of the 45+ we connect to.

Frequently Asked Questions

1. How many hours can a truck driver drive in a day?
Up to 11 hours of driving, within a 14-hour window that begins when the driver comes on duty after 10 consecutive hours off. Verify current limits with FMCSA.

2. Does the 14-hour clock stop if I take a break?
No. The 14-hour window runs continuously from the moment you come on duty. Breaks, loading time and waiting all consume it. This is the most commonly misunderstood rule in the set.

3. What is the 34-hour restart?
Taking 34 or more consecutive hours off duty resets the weekly 60 or 70-hour limit.

4. Can I drive after my 14-hour window closes?
No, though limited relief exists under the adverse driving conditions exception when conditions were genuinely unforeseeable.

5. What is personal conveyance?
Off-duty movement of a commercial vehicle for personal reasons. It has real limits, and using it to advance toward the next load is a common enforcement finding.

6. What happens if my ELD malfunctions?
There are required procedures, including reverting to paper logs and having the device repaired within a set timeframe. Know them before it happens rather than at roadside.

Published 09/29/26. Hours of service regulations change and contain exceptions this summary does not cover. This article is general information, not legal or compliance advice. Verify all current requirements directly with FMCSA. If something here is out of date, tell us at [email protected] and we will correct it.