Hours of Service Rules Explained
TruckMars Editorial · February 2, 2026
What to Know Before You Act on This
The 14-Hour Window Doesn't Pause
Once your 14-hour on-duty clock starts, it keeps running regardless of breaks, fuel stops, or time spent waiting at a dock. Unused drive-time hours don't carry over past the window's close.
The 34-Hour Restart Resets Your Weekly Clock
Accumulate 60 hours on duty in 7 days, or 70 in 8, and you can't drive again until you take a 34-hour consecutive break, which resets the weekly count back to zero.
One Missed 30-Minute Break Is a Common Violation
After 8 cumulative hours of driving, a 30-minute break is required before continuing. Inspectors check for this specifically, and it's one of the more frequently cited HOS violations.
Hours of Service Rules Explained
Hours-of-service rules look intimidating written out in full FMCSA regulatory language, but the core limits that actually govern a property-carrying driver's day boil down to a handful of numbers worth knowing cold. Get these limits internalized and the rest, the exceptions, the logging details, the edge cases, becomes much easier to reason through when they come up. This breakdown covers the daily driving and on-duty limits, the weekly reset rule, the required break, and the mistakes that most often turn into violations during a roadside inspection.
The Core Daily Limits: 11 and 14
Property-carrying commercial drivers get up to 11 hours of actual driving time within a 14-hour on-duty window. The two numbers work together but aren't the same thing: the 14-hour window is a hard clock that starts the moment you go on duty and counts continuously, including time spent loading, waiting at a dock, or fueling, whether or not you're actually driving. The 11 hours of drive time has to fit somewhere inside that 14-hour window, and once the window closes, any remaining unused drive-time hours are simply lost until your next off-duty reset.
The 10-Hour Reset
Before driving again after reaching either limit, a driver needs a minimum of 10 consecutive hours off duty. This reset is what opens a fresh 14-hour window and a fresh 11 hours of available drive time. Because the reset needs to be consecutive, a string of short breaks that add up to 10 hours doesn't count the same way as one uninterrupted 10-hour period, which is a distinction that trips up drivers who try to stack shorter rest periods.
The 60/70-Hour Rule and the 34-Hour Restart
Beyond the daily limits, drivers are also capped on a rolling weekly basis: no driving once you've accumulated 60 hours on duty in 7 consecutive days, or 70 hours in 8 consecutive days, depending on which cycle your carrier operates under. This limit exists independently of the daily 11 and 14-hour numbers, so it's entirely possible to be well within your daily limits on a given day and still be unable to drive because the weekly total has been reached.
The way back into service is a 34-hour restart: 34 consecutive hours off duty resets the weekly on-duty count back to zero, giving you a fresh 60 or 70-hour window to work with. Drivers running consistently long weeks often plan a restart deliberately rather than waiting to be forced into one by hitting the ceiling unexpectedly mid-route.
The 30-Minute Break Requirement
After 8 cumulative hours of driving time, a driver is required to take a 30-minute break before continuing to drive. The break can be satisfied by any non-driving status, off duty, sleeper berth, or on-duty not driving, as long as it totals 30 consecutive minutes. Because the 8 hours counts cumulative driving time rather than a single continuous stretch, it's easy to lose track of exactly when the clock crosses that threshold if you're not actively watching it.
Common HOS Violations to Watch For
The two mistakes that show up most often during roadside inspections are driving past the 14-hour window even when drive-time hours remain unused, and miscounting on-duty-not-driving time, which still counts against the 14-hour window even though it isn't drive time. Both mistakes usually come from treating the 11-hour driving limit as the only number that matters, when the 14-hour window is actually the harder constraint in a lot of real-world days involving delays, detention, or heavy dock time.
Keeping the Numbers Straight in Practice
Most ELDs track all of these limits automatically and will flag violations before they happen, but understanding the underlying rules matters for planning your day rather than just reacting to alerts. Knowing that the 14-hour window is a hard clock, not a flexible one, changes how you plan around detention at a shipper or receiver, since minutes lost waiting at a dock are minutes permanently subtracted from your available drive time for that day, with no way to get them back.
What Carriers Say
“I used to think the 11-hour driving limit was the number that mattered most until detention at a receiver ate my 14-hour window before I even got close to it.”
“Once I actually understood how the weekly 70-hour rule worked, I started planning my restarts on purpose instead of getting stuck by surprise mid-week.”