Wisconsin Truck Idling Law
Wisconsin has no statewide idling time limit; the statewide picture is a 550-pound weight allowance for idle-reduction technology (Wis. Stat. 348.15). The one local limit is in Madison, which caps idling at 5 consecutive minutes on public or private property (waived below 20F or above 90F), with fines of roughly $25 to $200.
When you can keep idling
This state has no statewide idling limit, so there are no statutory exemptions to list. Local ordinances, where they exist, carry their own.
APUs and idle-reduction gear
Idle-reduction tech earns up to a 550-pound weight allowance.
City and county ordinances
- Madison: 5 consecutive minutes for all motor vehicles on public or private property; waived below 20F or above 90F; exemptions for auxiliary equipment / reefer units, service or repair, traffic, and emergencies; fines roughly $25 to $200, escalating for repeats (Madison Gen. Ord. 12.1291).
Wisconsin Idling Law FAQ
Is there a truck idling law in Wisconsin?
How long can a truck idle in Wisconsin?
What is the fine for idling in Wisconsin?
Does an APU count as idling in Wisconsin?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://afdc.energy.gov/fuels/laws/IR?state=WI. See our Terms & Disclaimer.
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