34-Hour Restart
A 34-consecutive-hour off-duty period that resets a driver's weekly (60/70-hour) HOS clock.
34-Hour Restart in Practice
It's Optional, Not Required
A driver isn't obligated to use a 34-hour restart. Without one, weekly hours simply come back gradually as older days age out of the rolling 7 or 8-day window, which can work out fine depending on how a driver's week is structured.
It Must Be Fully Continuous
The 34 hours have to be one unbroken off-duty period. Any driving or on-duty activity during that window, even briefly, restarts the count from zero, which can quietly undo a planned restart if a driver isn't careful about staying off duty.
Restarts Cost Time, Not Just Hours
A full 34-hour restart takes a driver off the road for nearly a day and a half, time that isn't earning any revenue. Planning a restart around a home stop or a low-value lane minimizes the financial impact of that downtime.
34-Hour Restart: What It Means and Why It Matters
The 34-hour restart gives a driver a way to reset their rolling weekly hours of service clock, either 60 hours in 7 days or 70 hours in 8 days, by taking 34 consecutive hours off duty. Without it, a driver who's used up their weekly hours has to wait for older days to roll off the 7 or 8-day window before regaining hours, which can mean sitting idle for days depending on where they are in the cycle. Using a restart strategically, rather than being forced into one at an inconvenient point, is a key part of planning a multi-day run.
How the 34-Hour Restart Works
Under the standard weekly limit, a driver can be on duty for 60 hours in 7 consecutive days or 70 hours in 8 consecutive days, depending on the carrier's operation. As the days roll forward, hours used on the oldest day in that window drop off and become available again, meaning weekly hours slowly replenish on their own without any special action needed.
Taking 34 consecutive hours entirely off duty resets that weekly total back to zero immediately, rather than waiting for hours to age out gradually. This gives a driver full use of a new 60 or 70-hour week right away, which can be useful when a driver is close to running out of weekly hours but still has plenty of daily drive time left.
A Practical Example
A driver operating under a 70-hour, 8-day rule has used 68 of those hours by Thursday, leaving very little room to keep running through the weekend. Rather than waiting several more days for early-week hours to roll off the window, the driver takes 34 consecutive hours off starting Thursday evening, resetting the clock and coming back online Saturday morning with a full 70 hours available, even though only a couple of days of the original week have actually passed.
Why the Restart Matters for Owner-Operators
Running out of weekly hours mid-route without using a restart can mean sitting parked for several days waiting for hours to naturally roll back, which is lost earning time an owner-operator can't get back. Understanding when a restart makes sense, such as timing it around a home stop or a planned maintenance day rather than a high-paying lane, turns mandatory downtime into time that would have been spent off duty anyway.
Common Mistakes
A common mistake is starting a restart and then briefly going on duty during it, even for something small like moving the truck in a lot, which resets the entire 34-hour count back to the beginning. Staying fully off duty for the whole window is essential for the restart to count.
Another mistake is assuming a restart is always the fastest way back to full hours. Depending on how a driver's week is structured, waiting for hours to roll off naturally can sometimes get a driver back to a similar hour total without losing a full day and a half to a dedicated restart.
Related Calculators
Related Regulatory & Compliance Terms
Carriers on 34-Hour Restart
“I time my restarts around home time now instead of letting my hours force one on me mid-lane. It's downtime I'd be taking anyway, so it costs me almost nothing.”
“I moved my truck for ten minutes during what I thought was a restart and had to start the whole 34 hours over. Now I don't touch the truck until it's fully done.”