Under California Air Resources Board rules enforced regionally by the Bay Area Air Quality Management District, commercial motor vehicles over 10,000 pounds may not idle more than five minutes in San Francisco, with narrow exceptions.
13 CCR Section 2485 caps idling at five minutes for diesel-fueled commercial vehicles over 10,000 pounds gross vehicle weight, including delivery trucks and tour buses. The Bay Area Air Quality Management District (BAAQMD) handles complaints and enforcement in San Francisco, often coordinating with SFPD for school-zone idling. Schools have an additional 100-foot no-idling buffer under separate CARB rules. Exceptions cover safety inspections, traffic delays, queuing at ports, and PTO operation. Operators must post idling notices in cabs of newly registered fleet vehicles.
Fines start at $300 for first offense and rise to $1,000+ for repeat violations. Fleet operators face additional penalties for missing cab notices.
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See how San Francisco's vehicle idling restrictions rules stack up against other locations.
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