ELD and HOS / Logs
On-Duty Not Driving in trucking
Plain-English explanation
On-duty not driving (ONDND) is one of the four HOS duty status categories that a commercial driver logs electronically. It captures all time spent on duty that is not behind the wheel: waiting at a dock, loading or unloading assistance, pre-trip and post-trip inspections, fueling, scaling, safety checks, and any other work-related activity that is not driving. ONDND time counts against the 14-hour on-duty window but does not consume drive hours. The distinction matters for planning: a driver who spends 4 hours on ONDND at a shipper has not used any of their 11-hour drive limit, but they only have 10 hours remaining in their 14-hour window. They can still drive the full 11 hours — if those 11 hours fit within the remaining 10-hour window, they cannot. That math limits how far the driver can go from that pickup. For dispatchers, extended ONDND time compresses the drive hours that can be used within a single day's 14-hour window. A driver who spends 5 hours on ONDND at a facility (between arrival, live loading, and departure) has 9 hours of window remaining — they can drive a maximum of 9 hours, even though they still have the full 11-hour drive limit. Falsification of ONDND — for example, recording loading time as off-duty to preserve the 14-hour window — is an HOS violation. ELDs automatically record the engine status, which creates a record that is difficult to manipulate.
With logs and hours, timing matters. A phrase may sound simple, but the ELD record, duty status, supporting documents, and roadside inspection context can change how it should be handled.
Why it matters in trucking
ONDND time is the part of the 14-hour clock that does not show up in drive time but still consumes the day. Dispatchers who do not account for ONDND time when planning a driver's day end up with loads that the driver cannot legally complete — the delivery appointment cannot be reached within the remaining 14-hour window.
A clean ELD log is easier to defend when the driver and office understand the vocabulary before an edit, annotation, or inspection request comes in.
Example in real use
A driver starts their day at 06:00 — the 14-hour clock starts. They drive 3 hours to the shipper (09:00 arrival). Live loading takes 2.5 hours (11:30 departure). ONDND time at the shipper: 2.5 hours. Drive time so far: 3 hours. 14-hour window remaining: 5.5 hours (window expires at 20:00). The driver can still drive up to 8 more hours (11-3=8), but only has a 5.5-hour window. Realistic maximum drive from the shipper: 5.5 hours. The dispatcher must plan the delivery destination within reach at that pace.
Common mistakes or confusion
- Planning a driver's day using only drive time without accounting for ONDND — loading time, inspection time, and dock wait all consume the 14-hour window.
- Not logging pre-trip inspection as ONDND — pre-trip inspections are on-duty time and must be logged; driving directly after starting the engine without logging the pre-trip is an HOS inaccuracy.
- Confusing ONDND with sleeper berth time — sleeper berth is a specific off-duty category with different qualifying rules; ONDND is any on-duty non-driving activity, not rest.
Related terms
Related guides
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Sources and last updated
HOS and ELD definitions reflect the current FMCSA Hours-of-Service Summary and ELD regulatory guidance, including the September 2020 final rule. See the sources page for full reference list.
Last updated: 2026-05-08