Hours of Service Rules Guide for US Truck Drivers
US hours of service rules per FMCSA: 11 hours of driving after 10 hours off, all within a 14-hour window; a 30-minute break after 8 hours of driving; 60/70-hour weekly limits with a 34-hour restart; and sleeper-berth splits for flexibility. Plan every load around the clocks, and verify current requirements with FMCSA.
Hours of service rules are the federal limits on how long commercial truck drivers can drive and work before rest is required. Set by the Federal Motor Carrier Safety Administration, the HOS rules exist for one reason — fatigue kills — and they govern the daily reality of every interstate truck driver in America: when you can drive, when you must stop, and how rest is counted.
Violating HOS rules brings roadside citations, CSA score damage, carrier liability exposure, and in serious cases out-of-service orders. But beyond compliance, the rules are a planning tool: dispatchers and drivers who understand HOS deeply plan tighter, more profitable weeks than those who just try not to break the rules. This guide covers the core US HOS rules per FMCSA — with the standing caveat that you should verify current requirements with FMCSA directly, since rules are periodically updated.
JackRick Logistics is a truck dispatch service run by Shay Denise, a Freight Strategist and licensed commercial insurance broker based in Hampton Roads, Virginia, working with owner-operators and small fleets since 2022. HOS fluency is part of professional dispatch: every load plan Shay builds respects the driver's clocks. Our companion guide covers Canada's hours of service rules for cross-border operations.
The 11-Hour Driving Limit
After 10 consecutive hours off duty, a driver may drive up to 11 hours. That is the headline number and the hardest limit in the system: the 11th hour of driving ends the driving day regardless of what the other clocks say. No exception extends driving beyond 11 hours except the narrow adverse-driving-conditions provision.
The 11 hours are driving hours specifically — time actually operating the commercial vehicle. On-duty time that is not driving (fueling, loading, inspections) does not count against the 11, but it does count against the 14-hour window, which is why the two limits interact constantly in real trip planning.
For dispatchers, the 11-hour limit sets the maximum productive driving day. Load plans that require more than 11 hours of driving in a day are not ambitious — they are non-compliant. Plan the miles to fit the clock, not the other way around.
The 14-Hour Driving Window
Once a driver comes on duty after 10 consecutive hours off, a 14-hour window starts — and driving is only permitted within it. When the 14th hour arrives, driving must stop even if the driver has driven fewer than 11 hours. The window does not pause for meals, fuel stops, or waiting at shippers: it runs continuously.
This is the limit that punishes detention. Four hours waiting at a shipper does not just waste time — it burns four hours of the 14-hour window, potentially stranding the remaining driving hours. Detention pay disputes and HOS math are inseparable, which is why professional dispatchers fight detention as a compliance issue, not just a revenue one.
The interplay of the 11 and the 14 defines the driving day: at most 11 hours of driving, all within 14 hours of coming on duty. Every trip plan is an exercise in fitting miles, fuel, food, and shipper time inside those two constraints.
The 30-Minute Break Rule
After 8 cumulative hours of driving time, a driver must take a 30-minute break before driving again. Under the current FMCSA rules, the break may be satisfied by on-duty, not-driving time as well as off-duty or sleeper-berth time — a flexibility added in the 2020 HOS revisions that lets fuel stops and other on-duty tasks count.
The break must occur within the first 8 hours of driving time, and driving after 8 hours without the break is a violation. In practice, most drivers take the break around a fuel or meal stop mid-shift, which makes compliance nearly automatic for well-planned days.
Dispatchers should treat the 30-minute break as a fixed appointment in the day's plan rather than an afterthought. A trip plan that has no natural place for the break is a trip plan that will break the rule or break the schedule — usually both.
Sleeper Berth Provisions and Split Rest
The sleeper berth provision lets drivers split their required 10 hours off duty into two periods: one period of at least 7 consecutive hours in the sleeper berth, and another period of at least 2 consecutive hours (sleeper or off-duty), totaling at least 10 hours. The 7/3 and 8/2 splits are the commonly used combinations.
Split rest changes how the 14-hour window is calculated — the qualifying sleeper periods effectively pause the window's progression in specific ways defined by FMCSA. The mechanics are precise and widely misunderstood, which makes the sleeper provision both powerful and hazardous: used correctly it adds real flexibility to multi-day planning; used incorrectly it produces violations that look compliant to the driver.
For team operations and for solo drivers managing appointment times across days, split-sleeper fluency is advanced HOS craft. Drivers should study FMCSA's examples for their specific split before relying on it, and dispatchers should verify the math rather than trusting memory.
The 60/70-Hour Weekly Limits and the 34-Hour Restart
Beyond the daily limits, drivers may not drive after 60 hours on duty in 7 consecutive days (for carriers operating 7 days a week, the 70-hours-in-8-days limit applies). On-duty time — driving plus all other on-duty work — accumulates against the weekly cap regardless of the daily clocks.
The 34-hour restart lets a driver reset the weekly clock: 34 consecutive hours off duty restores the full 60/70 hours. Strategic use of the restart — timing it with home time or slow freight days — is a core skill in weekly planning, since a driver who burns through weekly hours mid-week without a restart plan loses productive days.
Recapping hours — gaining back the hours worked on the oldest day as each new day begins — is the alternative to restarting, and experienced drivers manage their weekly clocks as carefully as their daily ones. The weekly limit is where multi-day trip planning lives or dies.
Exceptions: Short-Haul, Adverse Conditions, and More
The short-haul exception exempts qualifying drivers from the ELD and some HOS recordkeeping requirements: generally, drivers operating within a 150 air-mile radius who start and end at the same location and stay within the time limits. It is widely used by local and regional operations — and widely misunderstood at its boundaries. Verify the current qualifying criteria with FMCSA.
The adverse driving conditions exception allows up to 2 additional hours of driving (and extends the window correspondingly) when the driver encounters adverse conditions — snow, ice, fog, unusual road conditions — that were not known before the trip began. It does not cover conditions the driver knew about when dispatching, and it never authorizes driving when fatigued or unsafe.
Other provisions — oilfield exceptions, agricultural exemptions during planting and harvest, utility service vehicle exceptions — apply to specific operations. If your operation might qualify for a specialized exception, verify the current regulatory text rather than relying on industry lore, which is frequently outdated.
ELDs, Enforcement, and Planning Like a Professional
Since the ELD mandate, hours are recorded electronically and roadside inspectors see the same data the carrier sees. There is no fudging the clocks anymore — which is ultimately good for professional drivers, because it makes compliant planning the only planning and puts rule-breakers at a visible disadvantage.
Enforcement runs through roadside inspections, compliance reviews, and the CSA system: HOS violations hit the Unsafe Driving and HOS Compliance BASICs, damage the carrier's safety profile, and raise insurance costs. For a small carrier, a pattern of HOS violations is an existential threat to both authority and insurability.
Professional HOS planning means building every load plan around the clocks: miles divided by realistic speed fit within the 11, shipper time accounted against the 14, the 30-minute break placed naturally, weekly hours projected across the trip, and restart or recap planned before the hours run out. That is what dispatch should do — and it is what JackRick dispatch does, at a flat 10% per load, invoiced Fridays, with 30 days' written notice. Call (757) 744-2484.
Plan the logbook around the freight, not the other way around: the professional dispatcher's HOS skill is seeing the 14-hour window, the 11-hour drive limit, and the weekly 60/70-hour clock as constraints to optimize within rather than obstacles to complain about. That means booking loads whose transit fits the driver's available hours with margin, positioning the 30-minute break where it costs least, and using the sleeper-berth split strategically on multi-day runs. Carriers that plan HOS-compliant from the quote stage rarely face roadside HOS violations; carriers that discover the hours problem mid-trip face it at the worst possible moment — tired, late, and tempted.
Key takeaways
- 11 hours driving after 10 off, all inside a 14-hour window — the two limits work together.
- A 30-minute break is required after 8 cumulative hours of driving time.
- Sleeper splits (7/3 or 8/2) add flexibility but demand precise math — verify with FMCSA examples.
- 60/70-hour weekly limits govern multi-day planning; the 34-hour restart resets the week.
- Detention burns the 14-hour window — fight it as a compliance issue, not just a revenue one.
Questions carriers ask
How many hours can a truck driver drive per day?
11 hours of driving after 10 consecutive hours off duty, and all driving must occur within a 14-hour window from when the driver came on duty. Both limits apply simultaneously — the driving day ends at whichever limit is reached first.
What is the 30-minute break rule?
After 8 cumulative hours of driving time, a driver must take a 30-minute break before driving again. The break can be on-duty not-driving, off-duty, or sleeper-berth time under current FMCSA rules, and it must occur within the first 8 hours of driving time.
How does the sleeper berth split work?
Drivers can split the 10 hours off duty into two periods — one of at least 7 consecutive hours in the sleeper berth and another of at least 2 hours (sleeper or off-duty), totaling 10 hours. The 7/3 and 8/2 splits are standard. The split changes how the 14-hour window calculates, so verify the mechanics with FMCSA's examples before relying on it.
What is the 34-hour restart?
34 consecutive hours off duty resets the 60/70-hour weekly clock to full. Drivers strategically time restarts with home time or slow days. The alternative is recapping — regaining hours from the oldest day as each new day begins.
Do short-haul drivers follow the same HOS rules?
Qualifying short-haul drivers (generally within 150 air-miles, starting and ending at the same location, within time limits) are exempt from ELD and some recordkeeping requirements, though driving-time limits still apply. Verify current qualifying criteria with FMCSA — the boundaries are commonly misunderstood.
Where can I verify the current HOS rules?
FMCSA is the authoritative source — its published hours-of-service regulations and guidance. Rules are periodically revised (as in the 2020 update), so verify current requirements directly rather than relying on any article, including this one.