The agricultural exemption is one of the most misunderstood rules in trucking. It does not mean farm-related trucks never need an ELD — it's narrow and condition-based. Here's how it actually works.
Under FMCSA rules, drivers transporting agricultural commodities are exempt from Hours of Service (HOS) — and therefore from the ELD requirement — when operating within a 150 air-mile radius of the source of the commodity, during the planting and harvesting periods defined by their state. When all three conditions are met, your HOS clocks effectively don't run, so you aren't required to record duty status on an ELD for that driving.
Miss any one of those conditions, and you're back under the normal Hours of Service rules and the ELD mandate.
The exemption doesn't disappear the moment you cross 150 air-miles — it changes how the clock counts. Time and distance driven inside the radius don't count toward your HOS limits at all. Your HOS clocks start when you cross the 150 air-mile line, and from that point you run under standard limits like the 11-hour and 14-hour rules. If your trip routinely runs beyond the radius, plan to log compliantly past that point.
| Assumption | Reality |
|---|---|
| "My truck is a farm truck, so I'm always exempt." | The exemption follows the load and conditions, not the truck. |
| "Processed product still counts." | Commercially processed goods generally don't qualify as ag commodities. |
| "150 miles means road miles." | It's a straight-line air-mile radius from the source. |
It's also worth knowing the ag exemption is separate from the general ELD exemptions like the 150 air-mile short-haul exemption and pre-2000 engine rule — different conditions, different paperwork.
Mixed operations are the hard part: exempt one week, fully regulated the next. TruckSpot ELD lets you run exempt when you qualify and switch to full HOS logging the moment a trip leaves the radius — with drive, shift, and cycle timers updating automatically from engine data, so you're never guessing at the line.
Stay compliant on every load — start for $1 →No. The exemption only applies while you're hauling agricultural commodities within 150 air-miles of the source during your state's planting or harvest season. Outside those conditions, normal Hours of Service and ELD rules apply.
FMCSA defines it broadly to include any agricultural commodity, non-processed food, feed, fiber, or livestock — including insects. Once a product is commercially processed, it generally no longer qualifies.
It's a straight-line ("as the crow flies") radius measured from the source where the commodity is loaded — not road miles. Time and miles run inside that radius don't count against your Hours of Service.