Who this is for: CDL drivers, fleet managers, owner-operators
Sleeper Berth Provision for CDL Drivers — Split Rest Explained
Drivers of CMVs equipped with a sleeper berth may split their required 10 consecutive off-duty hours into two separate periods: one of at least 7 hours in the sleeper berth and one of at least 3 hours off duty or in the sleeper berth. The paired periods together satisfy the 10-hour requirement and reset the 11/14-hour limits proportionally.
Important Notice
Sleeper berth calculations are among the most complex in HOS compliance. Drivers using the split provision should verify their ELD correctly handles the split calculations. Refer to 49 CFR 395.1(g) for the complete regulatory text.
What the sleeper berth provision allows
Under 49 CFR 395.1(g), a driver operating a CMV with a sleeper berth may split the 10-hour off-duty requirement into two separate rest periods rather than taking them as a single 10-hour block. The two periods must total at least 10 hours, with one period consisting of at least 7 consecutive hours in the sleeper berth, and the other period consisting of at least 2 consecutive hours — either in the sleeper berth or off duty (or a combination). Neither period can be less than 2 hours.
The 7/3 split option
The most common sleeper berth configuration is a 7/3 split: a qualifying rest period of at least 7 consecutive hours in the sleeper berth, and a second period of at least 3 consecutive hours (off duty or in the sleeper berth). When these two periods are paired, together they satisfy the 10-hour off-duty requirement. The pairing allows the driver's 11-hour and 14-hour limits to be calculated using only the on-duty time that falls between the two paired rest periods, not the full elapsed clock time.
How the split affects 11/14-hour calculations
Under the sleeper berth provision, the 11-hour driving limit and 14-hour window are calculated on the time elapsed between the smaller rest period and the larger sleep period — not from the original on-duty start. This allows a driver to effectively extend their available operating window over a longer real-time period by inserting a sleeper period in the middle of a long haul. The key calculation is that on-duty time before the smaller rest period is added to on-duty time after the smaller rest period, and both must fit within the 11/14-hour limits.
Practical use of the sleeper berth provision
The sleeper berth provision is most useful for long-haul drivers making coast-to-coast runs where a standard 10-hour rest block would interrupt the trip at an inconvenient point. A driver might drive several hours, take a 3-hour break in the sleeper berth, drive more hours, then take a 7-hour sleeper berth period. Together, the 3-hour and 7-hour periods satisfy the 10-hour off-duty requirement, and the driver's hours are calculated against the paired interval. The calculation requires careful tracking — ELDs handle the math automatically.
Sleeper berth equipment requirements
The CMV must be equipped with a sleeper berth that meets DOT specifications under 49 CFR 393.76 — minimum size requirements, ventilation, temperature control, and access. A driver who logs sleeper berth time in a non-compliant berth is not properly logging off-duty time. Sleeper berths must be part of the CMV itself — hotel time logged as sleeper berth time is a recordkeeping violation.
When sleeper berth rules are most useful vs. least useful
The sleeper berth provision is most valuable on long-haul runs where driving can't be completed in a single standard shift — coast-to-coast routes, overnight hauls that span two sleep periods, or runs where the driver needs to time arrival within a narrow delivery window. It's less useful (and often more confusing) for regional drivers who can complete their work within a standard 14-hour window and take a normal 10-hour break. Applying the split provision when it isn't necessary creates complex calculations that the ELD handles but the driver may not fully track. For most regional and short-haul operations, the standard rules are simpler and less error-prone.
Frequently Asked Questions
Does sleeper berth time count as off-duty time for the 34-hour restart?
Yes. Sleeper berth time counts as off-duty time for the 34-hour restart. A driver who spends 34 consecutive hours in some combination of off-duty and sleeper berth time (with no on-duty time) may claim the 34-hour restart.
Can the sleeper berth provision be used every day?
Yes, the sleeper berth provision can be used in every cycle. It is a standard operating mode for many long-haul drivers. However, the driver must correctly pair the two rest periods and ensure the on-duty time between them fits within the applicable 11-hour and 14-hour limits.
Must the two sleeper berth rest periods be taken consecutively, or can they be separated by any amount of driving time?
The two periods do not need to be consecutive. Under §395.1(g), the short rest period (minimum 2 hours) and the long sleeper berth period (minimum 7 hours) can be separated by driving and on-duty not driving. The key requirement is that they are "paired" — the 11-hour and 14-hour limits are then calculated against the on-duty time between the two paired periods, not from the original shift start.
When is using the sleeper berth provision most appropriate compared to just taking a standard 10-hour off-duty break?
The sleeper berth split makes most sense on long-haul runs of 1,000+ miles where completing the trip in a single standard shift is impossible and the driver needs to time their arrival at a delivery window. For regional drivers who regularly finish work within 14 hours, the standard 10-hour off-duty reset is simpler and less prone to ELD calculation errors. The split provision adds complexity that only pays off when the route genuinely requires it.