InstituteOverview (Level 1)Fleet SafetyHours of ServiceHours of ServiceFocus AreaEnglishAnalysisTransportationUSA
Hours of service
['Hours of Service']

To help prevent fatigue-related crashes, state and federal hours-of-service (HOS) regulations restrict when and for how long drivers of commercial motor vehicles (CMVs) may be behind the wheel. The rules require most truck and bus drivers to abide by strict limits on driving and on-duty time, get specific amounts of rest, and closely track their work hours. Drivers who violate the rules may be fined and/or ordered to stop driving.
Though HOS recordkeeping requirements are similar for all CMV drivers, the federal HOS rules in Part 395 place different limits on drivers of vehicles designed to carry property versus those designed for passengers.