The 11, 14 and 10 Hour Rules, and the Break That Sits Inside Them

The federal driving limits for property-carrying vehicles are three numbers that interact, and the interaction is what makes them easy to misapply.

The three limits

49 CFR 395.3 requires ten consecutive hours off duty before driving. It then permits driving for a maximum of eleven hours within a window, and prohibits driving after the fourteenth consecutive hour on duty following that off-duty period.

The eleven is a budget of driving time. The fourteen is a clock that starts when you come on duty and runs continuously, whether you are driving, loading or waiting. The ten is what resets both.

Why the fourteen-hour clock is the one that bites

The eleven-hour limit is spent only by driving. The fourteen-hour limit is spent by the passage of time. A driver who spends four hours at a dock has used four hours of the fourteen and none of the eleven, and may reach the end of the window with driving hours still unused and no lawful way to use them.

That asymmetry, rather than the driving limit itself, is what most detention disputes are actually about.

The thirty-minute interruption

The section also requires a thirty-minute interruption of driving status after eight cumulative hours of driving time without at least a thirty-minute break.

It is framed as an interruption of driving rather than as off-duty time, which means qualifying non-driving time can satisfy it.

The weekly limits

Section 395.3(b) sets the longer-run limits: sixty hours on duty in seven consecutive days for a carrier that does not operate every day of the week, or seventy hours in eight consecutive days for one that does.

Either period may restart with thirty-four or more consecutive hours off duty under subsection (c).

What this section does not cover

Short-haul operations under 395.1(e) are exempt from the thirty-minute interruption, and passenger-carrying vehicles run on a different set of numbers entirely. The limits above are for property-carrying drivers, and reading them onto a passenger operation produces the wrong answer.