California Code of Regulations Title 13 §2485 caps heavy-duty diesel truck idling at five minutes statewide, and §2480 prohibits school-bus idling near schools. San Jose enforces these limits through Bay Area Air Quality Management District and police officers.
13 CCR §2485 limits idling for diesel-fueled commercial vehicles over 10,000 pounds gross vehicle weight to five minutes anywhere in California, with narrow exemptions for traffic, safety equipment, sleeper-berth rest, and active loading. 13 CCR §2480 forbids school buses and transit vehicles from idling within 100 feet of a school or while actively loading. Bay Area Air Quality Management District Regulation 11 supplements state limits in the South Bay. San Jose patrol officers and BAAQMD inspectors respond to complaints near distribution centers in North San Jose, the Mineta SJC cargo zone, and along Highway 101 truck corridors.
California Air Resources Board issues civil penalties starting at $100 per first offense and rising to $300 to $1,000 per repeat, with daily violations possible. BAAQMD can add separate Notice of Violation fines.
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See how San Jose's vehicle idling restrictions rules stack up against other locations.
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