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What's on duty time?

This is the FMCSA's official definition of on-duty time:

On-duty time means all time from the time a driver begins to work or is required to be in readiness to work until the time the driver is relieved from work and all responsibility for performing work. On-duty time shall include:

  • All time at a plant, terminal, facility, or other property of a motor carrier or shipper, or on any public property, waiting to be dispatched, unless the driver has been relieved from duty by the motor carrier;
  • All time inspecting, servicing, or conditioning any commercial motor vehicle at any time;
  • All driving time as defined in the term driving time;
  • All time in or on a commercial motor vehicle, other than:
    • Time spent resting in or on a parked vehicle, except as otherwise provided in §397.5 of this subchapter;
    • Time spent resting in a sleeper berth; or
    • Up to 2 hours riding in the passenger seat of a property-carrying vehicle moving on the highway immediately before or after a period of at least 8 consecutive hours in the sleeper berth;
  • All time loading or unloading a commercial motor vehicle, supervising, or assisting in the loading or unloading, attending a commercial motor vehicle being loaded or unloaded, remaining in readiness to operate the commercial motor vehicle, or in giving or receiving receipts for shipments loaded or unloaded;
  • All time repairing, obtaining assistance, or remaining in attendance upon a disabled commercial motor vehicle;
  • All time spent providing a breath sample or urine specimen, including travel time to and from the collection site, to comply with the random, reasonable suspicion, post-crash, or follow-up testing when directed by a motor carrier;
  • Performing any other work in the capacity, employ, or service of, a motor carrier; and
  • Performing any compensated work for a person who is not a motor carrier.

Source: FMCSA