South Carolina Truck Idling Law
South Carolina applies its rule statewide: a diesel truck over 10,000 pounds may not idle more than 10 minutes in any 60-minute period (S.C. Code 56-35-20, penalty in 56-35-40). Sleeper-berth heat or AC is allowed during rest, when it is below 40F or above 80F, or at parking more than 500 feet from homes, schools, daycares, and hospitals. Running an APU is expressly not "idling" (56-35-30), so it is unlimited. The fine is $75 per offense.
When you can keep idling
- Traffic
- A safety or health emergency
- Repairs and inspections
- Work-related operations
- Loading or unloading
- Sleeper-berth heat or AC during rest, or below 40F or above 80F, or 500+ feet from homes, schools, daycares, and hospitals
APUs and idle-reduction gear
Running an APU or genset is expressly not idling under S.C. Code 56-35-30, so it is not limited by the 10-minute rule. Idle-reduction tech also earns up to a 550-pound weight allowance (S.C. Code 56-5-4160).
City and county ordinances
No notable city or county idling ordinance was found for South Carolina in the EPA, DOE, or ATRI references. Watch local noise and parking rules.
South Carolina Idling Law FAQ
Is there a truck idling law in South Carolina?
How long can a truck idle in South Carolina?
What is the fine for idling in South Carolina?
Does an APU count as idling in South Carolina?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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=SC. See our Terms & Disclaimer.
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