Who this is for: CDL drivers, fleet managers, owner-operators
30-Minute Rest Break Requirement for CDL Drivers
Property-carrying CMV drivers must take a 30-minute break before driving more than 8 cumulative hours without a 30-minute interruption. The break must be either off-duty time or sleeper berth time — on-duty not driving does not satisfy the requirement. Short-haul exempt drivers are not subject to the rest break.
When the 30-minute break is required
Under 49 CFR 395.3(a)(3)(ii), a driver may not drive after 8 cumulative hours have passed since their last off-duty or sleeper berth period of at least 30 minutes. The 8-hour clock is based on cumulative time elapsed since the last qualifying break — it is not a wall-clock window. If a driver has not had a 30-minute off-duty or sleeper berth break since coming on duty, they must take that break before their 8th hour of elapsed time (from start of shift) is reached.
What satisfies the 30-minute break requirement
The 30-minute rest break must be taken as: off-duty time (including personal conveyance logged as off-duty); or sleeper berth time. Time logged as on-duty not driving does not satisfy the rest break requirement — a driver who spends 45 minutes unloading and logs it as on-duty not driving has not taken a qualifying break. The break must be a single continuous 30-minute period, not accumulated in smaller increments.
How the 30-minute clock resets
The 8-hour clock resets after any qualifying 30-minute off-duty or sleeper berth period. After the break, the driver has another 8 cumulative hours before another break is required. If a driver has driven 5 hours, takes a 30-minute off-duty break, and then drives 4 more hours, the clock resets at the break — the driver may continue driving for up to 3 more hours (completing 8 hours since the last break) before needing another break, assuming 11-hour and 14-hour limits permit.
Drivers exempt from the rest break requirement
Short-haul drivers who qualify for the short-haul exemption under 49 CFR 395.1(e)(1) or (e)(2) are not required to take the 30-minute break. The short-haul exemption applies to drivers who operate within 150 air miles of their reporting location, return to the same location to end their shift, and do not require a log (either because they use the time record exemption or qualify as a 150 air-mile short-haul driver). Drivers who operate under a state-specific exemption or an FMCSA waiver may also be exempt — check the specific exemption terms.
How the 30-minute break interacts with the 14-hour window
A common source of confusion: the break requirement resets the 8-hour driving clock, but the 14-hour on-duty window keeps running regardless. If a driver takes a 30-minute off-duty break at hour 7 of their shift, they satisfy the break requirement and can drive another 8 cumulative hours — but the 14-hour window doesn't pause or extend. The 30 minutes off-duty doesn't count as on-duty time toward the weekly cycle, so that's a minor benefit. The net effect is that a qualifying break buys the driver more driving time within the same fixed window, not a larger window.
Frequently Asked Questions
Can the 30-minute break be taken while waiting at a loading dock?
Only if the time is logged as off-duty. If the driver is subject to the carrier's dispatch while waiting (cannot leave, must be available), the time is typically on-duty not driving, which does not satisfy the rest break requirement. If the driver is released and free to use the time as they choose, it may be logged as off-duty and count as a qualifying break.
Does the 30-minute break count against the 14-hour window?
Yes and no. The 14-hour window runs continuously from the start of on-duty time. An off-duty break does not pause the 14-hour window. However, the break time does not count as on-duty time toward the 60/70-hour weekly limit. So the break "uses up" 30 minutes of the 14-hour window but does not consume 60/70-hour cycle capacity.
Does time spent loading or unloading at a stop satisfy the 30-minute break?
No. Loading and unloading is logged as on-duty not driving, not as off-duty time. Under §395.3(a)(3)(ii), only off-duty time or sleeper berth time of at least 30 continuous minutes satisfies the break requirement. A driver who spends an hour at a dock has not taken a qualifying break unless that time was logged off-duty because they were fully relieved of responsibility.
If a driver is on-duty not driving — waiting at a receiver — does that time count toward the 8-hour break trigger?
Yes. The 8-hour break trigger under §395.3(a)(3)(ii) is measured from the last qualifying off-duty or sleeper berth break. Any on-duty time — driving or not driving — counts toward that 8-hour accumulation. A driver who waits on-duty at a receiver for 3 hours and then drives 5 more hours has hit the 8-hour threshold and must take the 30-minute break before driving further.