If you’re driving your own car, no federal law limits how many hours you can drive in a day. If you drive commercially, the cap depends on what you haul: freight drivers can drive up to 11 hours, and bus and motorcoach drivers up to 10, each within a longer on-duty window set by the Federal Motor Carrier Safety Administration.
Personal Vehicles Have No Federal Hour Limit
There is no federal regulation telling you how long you can spend behind the wheel of your own car, pickup, or SUV. You can legally drive for as many hours as you want in a single day.
Legal doesn’t mean safe, and it doesn’t mean consequence-free. NHTSA reported 633 deaths from drowsy-driving-related crashes in 2023, and estimates that roughly 91,000 police-reported crashes in a single recent year involved drowsy drivers.1National Highway Traffic Safety Administration. Drowsy Driving: Avoid Falling Asleep Behind the Wheel If you cause a crash while fatigued, states can charge you with reckless driving, vehicular assault, or vehicular homicide depending on what happens. The absence of a federal hour cap doesn’t shield you from criminal charges or civil suits after a fatigue-related wreck.
Who Counts as a Commercial Driver
Federal driving-hour rules apply to commercial motor vehicles in interstate commerce. A vehicle qualifies as commercial if it meets any one of these tests:2eCFR. 49 CFR 390.5 – Definitions
- Gross vehicle weight rating or actual gross weight of 10,001 pounds or more.
- Designed or used to carry more than 8 people, including the driver, for compensation.
- Designed or used to carry more than 15 people, including the driver, without compensation.
- Transporting hazardous materials in quantities that require placarding.
Rideshare cars and standard personal pickups sit well below the 10,001-pound threshold and carry fewer than 9 total occupants, so the Hours of Service rules in 49 CFR Part 395 don’t apply to them.
Daily and Weekly Limits for Freight Drivers
Drivers hauling property work under a set of interlocking limits rather than a single clock:3eCFR. 49 CFR 395.3 – Maximum Driving Time for Property-Carrying Vehicles
- 10 consecutive hours off duty before starting your shift.
- 11 hours of driving allowed once the shift begins.
- All driving must happen within a 14-consecutive-hour on-duty window. Once the 14th hour passes, you cannot drive again, even if you have unused driving hours left. Breaks, fueling, loading, and paperwork don’t pause the clock.
- A 30-minute break is required before driving past 8 cumulative hours of driving time. Off-duty time, sleeper berth time, or any non-driving status counts.
The 14-hour window is where most drivers get caught. If you come on duty at 6 a.m. and spend three hours loading, you don’t get those hours back. Your window closes at 8 p.m. regardless.
Weekly Caps and the 34-Hour Restart
Daily limits alone would still let a driver push dangerously hard over a full week, so total on-duty time is capped on a rolling basis:
- 60 hours in 7 days if your carrier does not operate every day of the week.
- 70 hours in 8 days if your carrier operates daily.
You can reset that rolling clock by taking at least 34 consecutive hours off duty. Most long-haul drivers plan their weeks around earning a restart, often over a weekend.
Daily and Weekly Limits for Bus and Motorcoach Drivers
Passenger-carrying drivers operate under a similar structure with different numbers:4eCFR. 49 CFR 395.5 – Maximum Driving Time for Passenger-Carrying Vehicles
- 8 consecutive hours off duty before driving again.
- 10 hours of driving allowed after that rest.
- No driving after being on duty for 15 hours following the 8 hours off.
The weekly caps match the freight rules: 60 hours in 7 days or 70 in 8. Passenger-carrying drivers are not required to take the 30-minute driving break, and the 34-hour restart provision applies only to property-carrying operations.
Situations That Change the Numbers
Short-Haul Operations
Drivers who stay within a 150 air-mile radius of their normal work reporting location and return there within 14 hours don’t have to keep detailed driving logs.5Federal Motor Carrier Safety Administration. Summary of Hours of Service Regulations The underlying driving-time limits still apply, but no electronic logging device is required. Time records maintained by the carrier substitute for the log. Local delivery, construction hauling, and utility work often qualify.
Adverse Driving Conditions
If you hit unexpected bad weather, road closures, or other hazards after a trip has started, you can extend both your driving time and your on-duty window by up to 2 hours to reach your destination or a safe stopping point. A freight driver can push to 13 driving hours and a 16-hour window under this exception. The condition has to be genuinely unexpected: if your carrier dispatches you into an active blizzard, the exception doesn’t apply.6Federal Motor Carrier Safety Administration. Guidance on Adverse Driving Conditions and Emergency Conditions Exceptions
Agricultural Hauling
During state-designated planting and harvesting seasons, drivers hauling agricultural commodities are fully exempt from HOS rules within a 150 air-mile radius of the commodity’s source.7Federal Motor Carrier Safety Administration. ELD Hours of Service (HOS) and Agriculture Exemptions Once the driver crosses beyond that radius, standard HOS rules apply for the rest of the trip.8Federal Motor Carrier Safety Administration. The Agricultural Commodity Exemption in 49 CFR 395.1(k)(1) to the Hours of Service Regulations Livestock, produce, and farm supplies all count.
Emergency Declarations
When the President, a governor, or FMCSA declares an emergency, drivers directly assisting the relief effort can be exempted from HOS rules for up to 30 days.9Federal Motor Carrier Safety Administration. Emergency Declarations, Waivers, Exemptions and Permits The exemption covers the entire route to the emergency, including states not named in the declaration, but doesn’t waive CDL, drug and alcohol testing, or hazmat rules. It only lasts while the emergency is ongoing and you’re actively providing relief.
Sleeper Berth Split
Freight drivers with a sleeper berth can split the required 10 hours off duty into two rest periods:10eCFR. 49 CFR 395.1 – General Applicability and Definitions
- One period of at least 7 consecutive hours in the sleeper berth.
- Another period of at least 2 consecutive hours, either off duty or in the sleeper berth.
- Together they must total at least 10 hours.
When you use the split, the 14-hour window pauses during qualifying rest rather than running straight through. Driving time before and after each rest gets combined and measured against the 11- and 14-hour limits.
Personal Conveyance
A commercial driver relieved of all work responsibilities can move the truck for personal reasons, such as driving to a restaurant, motel, or home, without logging that time as on duty. FMCSA allows personal conveyance even with a loaded trailer, provided the load is not being actively transported for the carrier’s benefit.11Federal Motor Carrier Safety Administration. Personal Conveyance Driving past available rest stops to get closer to your next pickup doesn’t qualify. Neither does repositioning an empty trailer at the carrier’s direction or driving to maintenance. Carriers can also impose stricter rules than FMCSA’s guidance, including banning personal conveyance entirely.
What Happens If You Exceed the Limits
Consequences arrive in layers. At a roadside inspection, an officer who finds an HOS violation can place you out of service on the spot. You cannot drive again until you’ve completed enough off-duty time to come back into compliance. That is an immediate, unpaid halt to your workday.
Beyond the roadside shutdown, FMCSA assesses civil penalties against both drivers and carriers. The penalty schedule in 49 CFR Part 386 Appendix B sets maximum fines that are adjusted annually for inflation, with carriers facing significantly larger maximum fines per violation than individual drivers. Knowingly falsifying a log carries its own separate penalty category. The most serious tier covers egregious violations, defined as exceeding the driving-time limit by more than 3 hours; the agency seeks the maximum penalty the law allows.12eCFR. Appendix B to Part 386 – Penalty Schedule
HOS violations also feed into the carrier’s safety score through FMCSA’s Compliance, Safety, and Accountability system. Each violation raises the carrier’s percentile ranking in the HOS Compliance category, and violations stay on the record for 24 months.13Federal Motor Carrier Safety Administration. HOS Compliance BASIC Factsheet A poor ranking triggers warning letters, investigations, and potentially an order to cease operations. For individual drivers, carriers check CSA data before hiring, so a pattern of HOS problems makes future work harder to find.