Virginia Truck Idling Law
Virginia's air rule (9VAC5-40-5670) holds commercial vehicles to 3 minutes while parked in commercial or residential urban areas, but diesel trucks get up to 10 minutes to avoid restart problems. It applies in urban areas, not in the countryside. The maximum civil penalty is high on paper — up to $32,500 per violation, each day a separate offense (Va. Code 10.1-1316(B)) — but routine enforcement is uncommon. Fairfax County runs a stricter 3-minute limit for any mobile source with no diesel allowance.
Some figures on this page are flagged medium confidence. The limit and source are solid, but a specific fine or local detail should be confirmed with the state agency before you rely on it.
When you can keep idling
- Diesel trucks: up to 10 minutes to avoid restart trouble
- Tour buses: up to 10 minutes in hot weather for AC
- Auxiliary power for purposes other than heat or AC
APUs and idle-reduction gear
Auxiliary power is exempt only for purposes other than heat or AC, so run an APU with the main engine off. Idle-reduction tech earns up to a 550-pound weight allowance.
City and county ordinances
- Fairfax County: any mobile source may not idle more than 3 minutes after it stops doing its work (Fairfax County Code 103-3-10(b)); penalty up to $1,000, with no 10-minute diesel allowance stated in the county code.
Virginia Idling Law FAQ
Is there a truck idling law in Virginia?
How long can a truck idle in Virginia?
What is the fine for idling in Virginia?
Does an APU count as idling in Virginia?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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=VA. See our Terms & Disclaimer.
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