The Sleeper Berth Exception is a specific regulation within the Federal Motor Carrier Safety Administration (FMCSA) Hours of Service (HOS) rules that allows long-haul truck drivers to "split" their mandatory 10-hour off-duty period. Under the current 2026 rules, drivers can split their 10 hours into two periods: a 7/3 split or an 8/2 split. For example, a driver can spend 7 hours in the sleeper berth and 3 hours off-duty (or in the berth) later in the day. As long as the two periods total at least 10 hours, and neither period is less than 2 hours (for the shorter break) or 7 hours (for the longer break), the driver remains in compliance. This exception provides drivers with much-needed flexibility to avoid traffic congestion, rest when they are actually tired, or manage irregular loading dock schedules without "burning" their limited 11-hour driving window. It is a critical tool for safety, as it encourages drivers to take a nap when they feel fatigued rather than pushing through to complete a single 10-hour block.