Idaho Work Zone Laws

How Idaho handles work zones

Idaho keeps it simple. The orange work-zone 'SPEED LIMIT XX' sign is a hard limit whenever it stands, workers or not, and exceeding it is a $50 fixed-penalty infraction (Idaho Code 49-657). Idaho does not double work-zone fines the way its neighbors do. Obey the flagger's STOP/SLOW paddle and yield to the crew (49-801, 49-643). Your phone must be hands-free statewide, in the zone or out of it.

Speed, fines, phone, and the flagger

• Speed rule: The posted reduced work-zone limit is a legal limit whenever the signs are standing, workers present or not. Idaho posts a 'reduced speed limit / enhanced penalty' work zone, and exceeding that limit is its own infraction under 49-657 (applies always while signed).
• Fine multiplier: $50 fixed penalty, no statutory doubling. Idaho does not double work-zone fines; exceeding the posted limit is a standalone $50 infraction (Idaho Code 49-657), stiffer than a low-end minor-speeding ticket.
• Phone in a work zone: Restricted — put it down
• Flagger authority: A flagger's STOP/SLOW paddle is a traffic-control device you must obey under Idaho Code 49-801, and you must yield to workers in a signed construction or maintenance area (49-643). Blowing past either is an infraction.
• Base fine: $50 fixed penalty under Idaho Code 49-657, closer to $90-$100 once court costs are added.

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