Idaho Weigh Stations & Ag Inspection

When Idaho makes you pull in

Idaho runs Ports of Entry. Gross 26,001 lb or more and you stop when the port is open and signs or an officer send you in (Idaho Code 40-511). Placarded hazmat stops at 10,000 lb. A lit OPEN sign is the order; dark or CLOSED means stay on the mainline, but portable scales still work the corridor. PrePass and Drivewyze can green-light you past. Blow by an open port and it is a misdemeanor, up to $1,000 and six months (Idaho Code 40-512).

Stations, bypass, and inspection

• Who must stop: Over a weight threshold
• Where the stations are: Fixed Ports of Entry on I-84 (East Boise), I-86, I-15 (Sage Junction, Inkom), and I-90, plus major US highways. Lit OPEN/CLOSED signs; hours vary by port and some run long shifts. Portable scales and weigh-in-motion sensors work the gaps between fixed ports.
• Bypass: PrePass and Drivewyze both operate in Idaho, and ITD ports are authorized to electronically green-light qualified rigs. PrePass uses the windshield transponder; Drivewyze runs off the app/ELD. A green light means stay on the mainline; a red or no signal means pull into the open port.
• Ag / border inspection: No produce or pest border-inspection stations. Idaho ports do grade certain commodities (potatoes, for example), but that is a commodity check at the port, not a separate agricultural quarantine station.
• Fine for passing an open station: Failing to stop at a port when required, or to submit to inspection, grading, or weighing, is a misdemeanor: up to a $1,000 fine, up to six months in county jail, or both (Idaho Code 40-512).

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