What is the 34-hour restart rule?
The calculation is continuous and moves forward with every passing day. It does not “reset” simply because a new week begins (e.g., on a Monday). Instead, the driver’s total on-duty hours are evaluated against the specific window of the preceding days:
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The 60-Hour Rule (7-Day Cycle): You cannot exceed 60 hours of on-duty time in any period of 7 consecutive days.
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The 70-Hour Rule (8-Day Cycle): You cannot exceed 70 hours of on-duty time in any period of 8 consecutive days.
How the “Recap” (Rolling) Calculation Works
Every day, the driver adds the hours they worked that day to their cumulative total and subtracts the hours they worked on the oldest day of the cycle.
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Adding: Your current day’s on-duty hours increase your total.
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Subtracting: As each day passes, the hours you worked exactly 7 or 8 days ago “fall off” the back end of the calculation.
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Result: This gives you a clear picture of how many hours you have remaining for the current day.
The Only Way to Reset the Clock
Because the calculation is always rolling, it only truly “resets” if you perform a 34-hour restart. This involves taking at least 34 consecutive hours off-duty, which clears your accumulated hours to zero and allows you to start a fresh 7- or 8-day cycle.
Frequently Asked Questions
Is the 34 hour restart mandatory?
The 34-hour restart is not mandatory. It is a purely optional provision that allows a driver to reset their 60- or 70-hour weekly “clock” to zero.
Understanding the 34-Hour Restart
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Voluntary Use: You are never required by the Federal Motor Carrier Safety Administration (FMCSA) to take a 34-hour restart. If you have hit your weekly limit, you can choose to wait for your “rolling” hours to fall off the back end of your 7- or 8-day cycle instead.
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The “Reset” vs. “Rolling” Method:
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The Restart: You take 34 consecutive hours off-duty (or in the sleeper berth). This clears your accumulated hours to zero, giving you a fresh 60 or 70 hours.
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The Rolling Method: You continue to drive by calculating your total hours for the last 7 or 8 days. As each new day passes, the hours you worked exactly 7 or 8 days ago “drop off,” freeing up those hours for you to use today.
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Regulatory History: You may encounter information mentioning a “two-night” requirement (1 a.m. to 5 a.m.). That provision was suspended in 2014 and later removed from the regulations entirely; it is no longer a requirement.
Key Takeaway
You should never feel pressured to take a 34-hour restart if it doesn’t fit your schedule, provided you are managing your hours correctly under the rolling 7- or 8-day limit. It is simply a tool to help you regain full capacity more quickly if you need it.
