California Code of Regulations Title 13 §2485 bans idling commercial diesel vehicles over 10,000 pounds for more than five minutes statewide. CARB and San Diego County Air Pollution Control District enforce this rule across all city neighborhoods.
Under 13 CCR §2485, drivers and operators of diesel-fueled commercial motor vehicles weighing over 10,000 pounds gross vehicle weight may not idle the engine for more than five consecutive minutes at any location in California, including San Diego. The rule applies to delivery trucks, buses, and refrigerated transport. Limited exceptions cover vehicles in traffic, queueing for inspection, operating power-take-off equipment, sleeper-berth use during rest periods on cold days, or addressing safety needs. School buses face additional 100-foot setback rules from schools under §2480. CARB and the San Diego County Air Pollution Control District field complaints and issue citations across all neighborhoods.
Each idling violation is a civil penalty up to one thousand dollars per day under CARB enforcement authority. Repeat offenders face escalating fines, fleet audits, and potential referral to the district attorney for misdemeanor prosecution.
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See how San Diego's vehicle idling restrictions rules stack up against other locations.
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