Pennsylvania Truck Idling Law
Pennsylvania bars diesel trucks over 10,000 pounds in commerce from idling more than 5 minutes in any 60-minute period (Act 124 of 2008, 35 P.S. Ch. 23B). There is no cold-weather sleeper-berth break anymore; that exemption expired in 2010, so plan on an APU, which can run without limit. The fine is $150 to $300, and DEP can separately assess civil penalties up to $1,000 per day. Philadelphia is stricter at 2 minutes for heavy diesels under Air Management Regulation IX. Note the idle-reduction weight allowance is 400 pounds, not 550.
When you can keep idling
- Traffic and emergencies
- Maintenance and diagnostics
- PTO and loading work
- Bus passenger comfort
- Certified Clean Idle (CARB NOx) trucks
APUs and idle-reduction gear
An APU may run without limit in place of the main engine. Idle-reduction tech earns up to a 400-pound weight allowance (35 P.S. 4604; 75 Pa.C.S. 4941, 4945) — Pennsylvania grants 400 lbs, not the 550-lb federal ceiling.
City and county ordinances
- Philadelphia: 2 minutes for heavy-duty diesels, tickets up to $300 per day (5 minutes allowed below 32F, 20 minutes below 20F, zero for layovers) under Air Management Regulation IX, Section III. (Code 12-1127 is a separate 3-minute general-vehicle limit.)
Pennsylvania Idling Law FAQ
Is there a truck idling law in Pennsylvania?
How long can a truck idle in Pennsylvania?
What is the fine for idling in Pennsylvania?
Does an APU count as idling in Pennsylvania?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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=PA. See our Terms & Disclaimer.
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