The Core Hours-of-Service Limits Property Drivers Must Know

Hours-of-service rules limit how long commercial drivers may drive and work before rest is required. They are designed to reduce fatigue. The rules contain exceptions and special situations, but every driver should first understand the core structure.

The 11-hour driving limit

Under the federal property-carrying rules summarized by FMCSA, a driver may drive a maximum of 11 hours after 10 consecutive hours off duty. This is driving time—not simply the total length of the workday.

The 14-hour driving window

A property-carrying driver generally may not drive beyond the 14th consecutive hour after coming on duty following 10 consecutive hours off duty. The 14-hour period is often called the driving window. Ordinary off-duty time during the workday does not stop or extend that window.

The 30-minute break rule

FMCSA’s summary states that a 30-minute break is required after 8 cumulative hours of driving without at least a 30-minute interruption. The interruption can be any non-driving period of 30 consecutive minutes, including on-duty not driving, off duty, sleeper berth, or a consecutive combination of those statuses.

The 60/70-hour limits

A driver may not drive after accumulating 60 hours on duty in 7 consecutive days, or 70 hours in 8 consecutive days, depending on the carrier’s operation. These are rolling periods, so the calculation changes as older days fall out of the window.

Sleeper berth and exceptions

The sleeper-berth provision can allow qualifying rest periods to be split when regulatory conditions are met. FMCSA also describes exceptions for short-haul operations and adverse driving conditions. These provisions have detailed requirements and should never be applied from memory based only on a short summary.

Passenger-carrying drivers follow different maximum-driving and on-duty limits. Do not apply property-carrying rules to a passenger operation.

Why “waiting” may still be on duty

Duty status depends on whether the driver is relieved of responsibility and free to pursue personal activities. Time spent loading, inspecting, fueling, completing paperwork, or waiting while still responsible for the vehicle or load may be on-duty time even when the truck is not moving.

A better way to study HOS scenarios

1. Identify whether the operation is property- or passenger-carrying.
2. Mark when the qualifying off-duty period ended.
3. Track driving time separately from total on-duty time.
4. Locate the end of the driving window.
5. Check the cumulative 7- or 8-day total.
6. Only then evaluate whether a specific exception applies.