Glossary
Detention Time
How detention time drains the 14-hour window without adding miles — and what the dispatcher needs to do the moment wait time exceeds the plan's buffer.
By Dale Connors, Founding Editor · Content reviewed quarterly against FMCSA guidance and official state resources. Definition
Detention is the time a commercial driver spends waiting at a shipper or receiver beyond the expected loading or unloading window. This waiting time is typically recorded as on-duty not driving, which means it counts against the 14-hour duty window without advancing the truck toward its destination.
Detention is one of the most consistent sources of HOS plan failure. A plan that accounts only for transit time will fail whenever detention exceeds the buffer built into the schedule — which is frequently, especially at high-volume distribution centers, ports, and grocery warehouses.
What different detention lengths require from dispatch
| Detention duration | HOS impact | Parking plan impact | What dispatch should do |
|---|---|---|---|
| Under 30 min | Within most buffers | No change needed | Monitor; no action required |
| 30–90 min | Reduces margin, eats into buffer | May push arrival later at planned stop | Note the delay; update ETA if appointment is affected |
| 2–3 hrs | Significant — may eliminate planned stop window | Must rebuild parking from current position | Recalculate available hours now; name a revised overnight stop before driver leaves the dock |
| 4+ hrs | May require a restart before next load is possible | Original overnight stop may be unreachable | Rebuild the entire day plan; contact customer with realistic ETA; assess whether next load appointment holds |
In the dispatch conversation
When detention exceeds the buffer, the right response is an immediate plan rebuild — not waiting until the driver reports it at end of day. A dispatcher who learns at noon that the driver has been waiting 3 hours with a 90-minute buffer should recalculate the available window, identify a revised parking stop, and update the next appointment before the driver leaves the dock. Waiting converts a manageable schedule adjustment into a compliance and safety problem.
For owner-operators, detention has both a compliance dimension (it consumes HOS) and a financial one. Most broker and carrier contracts include detention pay provisions that begin after 2 hours at a stop — but only if the driver documents arrival and wait times correctly.
Why it matters in trip planning
Detention is predictable in aggregate even when it is unpredictable on any individual load. Certain shippers and receivers are consistently slow. Certain delivery windows create predictable dock congestion. A dispatcher who knows a specific receiver regularly runs 2–3 hours of detention should build that into the plan, not treat it as an exceptional event.
When detention pushes into the evening hours, it compresses the window for parking. A driver who exits detention at 7 PM in a busy freight market with limited remaining hours faces a worse parking situation than a driver who finished at 4 PM. Planning around likely detention means choosing parking earlier in the route or building in more clock buffer before the final delivery.
What to check before relying on this
Track actual arrival time at the stop, contact dispatch when detention exceeds the expected buffer, and rebuild the parking and HOS plan together — do not wait until the driver is already out of clock. Document detention timing precisely for any detention pay claims.
Related terms
- 14 hour clock
- duty status
- backup parking plan
How does detention time affect a truck driver's HOS?
Detention time is typically recorded as on-duty not driving, which means it counts against the 14-hour duty window. Every hour a driver waits at a dock is an hour that closes the 14-hour window without advancing the truck. If detention is not accounted for in the dispatch plan, the driver arrives at end of day with fewer usable hours than expected — which can eliminate the ability to reach a planned overnight stop or deliver on time.
What is detention pay for truck drivers?
Detention pay is compensation for time spent waiting at a shipper or receiver beyond a standard free time period, usually 2 hours. Specific terms — how much is paid, when it starts, and how it is documented — vary by carrier contract, broker agreement, and customer arrangement. Owner-operators typically negotiate detention pay directly with brokers or shippers. Company drivers receive detention pay per their carrier's settlement policy. Correct documentation of arrival time and wait time is required to support any detention pay claim.