Vehicle Idling Restrictions: Hesperia vs San Bernardino
How do vehicle idling restrictions rules compare between Hesperia, CA and San Bernardino, CA?
Hesperia and San Bernardino have similar restriction levels.
Hesperia, CA
San Bernardino County
California Air Resources Board limits commercial diesel idling to 5 minutes statewide, enforced aggressively in San Bernardino County warehouse hubs like Fontana, Ontario, and the Inland Empire. SCAQMD adds local enforcement in non-attainment basins.
View full Hesperia rules →San Bernardino, CA
San Bernardino County
California Air Resources Board limits commercial diesel idling to 5 minutes statewide, enforced aggressively in San Bernardino County warehouse hubs like Fontana, Ontario, and the Inland Empire. SCAQMD adds local enforcement in non-attainment basins.
View full San Bernardino rules →Key Facts Comparison
| Fact | Hesperia | San Bernardino |
|---|---|---|
| Idling limit | 5 minutes | 5 minutes |
| Vehicle threshold | Over 10,000 pounds | Over 10,000 pounds |
| Enforcement | CARB and SCAQMD | CARB and SCAQMD |
| Minimum fine | 300 dollars | 300 dollars |
Highlighted rows indicate differences between cities.
Hesperia FAQ
Are refrigerated trailers exempt?
Reefer units running for cargo temperature control are regulated separately under CARB Transport Refrigeration Unit rules but are not exempt from idling limits when the truck engine itself is off.
Can drivers idle to use heaters?
No, idling for cab comfort is not exempt. Drivers must use auxiliary power units, electrified parking spaces, or shut down the engine when stopped longer than five minutes.
San Bernardino FAQ
Are refrigerated trailers exempt?
Reefer units running for cargo temperature control are regulated separately under CARB Transport Refrigeration Unit rules but are not exempt from idling limits when the truck engine itself is off.
Can drivers idle to use heaters?
No, idling for cab comfort is not exempt. Drivers must use auxiliary power units, electrified parking spaces, or shut down the engine when stopped longer than five minutes.
Compare other topics
See how Hesperia and San Bernardino compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool