California has regulations that restricts the idling of heavy-duty vehicles.
Why Idling regulations? The California Air Resources Board (CARB) states: "Emissions from on-road heavy-duty vehicles are major contributors to poor air quality in California. In particular, diesel vehicles produce emissions in amounts highly disproportionate to the total population of these vehicles. The problem is complicated by the large number of heavy-duty vehicles, like line haul trucks, registered in other states that travel on California's highways and roads, while bringing goods and commerce into and out of our state. The Air Resources Board is working closely with the U.S. Environmental Protection Agency, engine and vehicle manufacturers, and other interested parties to address this issue and reduce heavy-duty vehicle emissions in California. Although this program targets both diesel-cycle and otto-cycle engines, more recent attention has been focused on diesel engines due to the identification of diesel PM1 as a known carcinogen."
In addition to the issue of air quality, there is CO2 emissions that contribute to climate change. In California, it is estimated that parked idling of all motor vehicles emit 3 million tons of CO2 annually2
• Airborne Toxic Control Measure to Limit Diesel-Fueled Commercial Motor Vehicle Idling. This measure requires, among other things, that drivers of diesel-fueled commercial motor vehicles with gross vehicle weight ratings greater than 10,000 pounds, including buses and sleeper berth equipped trucks, not idle the vehicle’s primary diesel engine longer than five minutes at any location. Violation penalty: $300
• School Bus Idling Airborne Toxic Control Measure. This measure limits school bus idling and idling at or near schools to only when necessary for safety or operational concerns. The program targets school buses, school pupil activity buses, youth buses, paratransit vehicles, transit buses, and heavy-duty commercial motor vehicles that operate at or near schools.
• Idling limits for owners, operators, renters or lessees of in-use off-road diesel vehicles. The Off-road regulation is designed to reduce harmful emissions from diesel powered construction and mining vehicles operating in California. Fleet owners are subject to retrofit or accelerated replacement/repower requirements for which ARB must obtain authorization prior to enforcement from the United States Environmental Protection agency under the federal Clean Air Act. However, the Off-road regulation also imposes idling limitations on owners, operators, renters or lessees of off-road diesel vehicles, which the ARB is authorized to enforce. Violation penalty: up to $10,000 a day.
California Regulations Related to Idling
• Stopping, Standing, and Parking [motor on while unattended] 22515. ALL MOTOR VEHICLES.
(a) No person driving, or in control of, or in charge of, a motor vehicle shall permit it to stand on any highway unattended without first effectively setting the brakes thereon and stopping the motor thereof.
(b) No person in control of, or in charge of, any vehicle, other than a motor vehicle, shall permit it to stand on any highway without first effectively setting the brakes thereon, or blocking the wheels thereof, to effectively prevent the movement of the vehicle.
• Heavy-duty diesel smoke emission testing, and heavy-duty vehicle emission control system inspections. Violation penalty: up to $1,800.
1Particulate matter: the black soot that emanates from a diesel vehicle's exhaust (note that due to EPA mandated emission controls, properly maintained diesels manufactured from 2010 emit much less PM).
2U.S. Dept. of Energy: "Researchers estimate that idling from heavy-duty and light-duty vehicles combined [in the U.S.] wastes about 6 billion gallons of fuel annually." Studies conclude that about half of all idling occurs when parked (not in traffic). For California, then, it is estimated that idling when parked emits more than 3 million tons of carbon dioxide, in the process consuming 330 million gallons of fuel.
Report commercial vehicle idling, or school buses or commercial vehicles at or near school: Idling commercial vehicles are detrimental to California's air quality. You can help reduce the harmful air pollutants caused by idling vehicles by completing a complaint form. The ARB will be in contact with the vehicle owner to address the issue. To reach the ARB's Vehicle Complaint Hotline, please call 1-800-363-7664 or 1-800-END-SMOG.
Report smoking vehicle: Smoking vehicles are detrimental to California's air quality. Here's how you can help reduce harmful air pollutants caused by smoking vehicles:
• Keep up the maintenance on your own car, truck, or other vehicle. A well-maintained vehicle is a cleaner-running vehicle.
• Report smoking vehicles (ANY MOTOR VEHICLE: CAR, SUV, PICKUP, HEAVY-DUTY TRUCK OR BUS) on the roadway.
Call the Air Resources Board or local Air Pollution Control District:
Air Resources Board (throughout California) 1-800-END-SMOG
Bay Area AQMD 1-800-EXHAUST
San Diego County APCD 1-800-28-SMOKE
San Joaquin Valley Unified APCD 1-800-559-9AIR
Shasta County AQMD 1-888-249-SMOG
South Coast AQMD 1-800-CUT-SMOG
Ventura County APCD 1-800-559-SMOG
American Transportation Research Institute (ATRI) Compendium of Idling Regulations (June 2016)
States (7) with regulations for all vehicles: Connecticut, Hawaii, Massachusetts, Maryland, New Hampshire, New Jersey, Vermont
States (11) with regulations for commercial diesel or all diesel vehicles: California, Delaware, Maine, Nevada, New York, Oregon, Pennsylvania, Rhode Island, South Carolina, Virginia, West Virginia
12 additional states have jurisdictional regulations
The following California municipalities are known to have non-binding vehicle idling ordinances and policies that extend beyond the State of California idling regulations by incorporating light-duty vehicles:
CUPERTINO: Climate Action Plan (extracted pages pertaining to anti-idling policy)
SAN JOSE: Green Fleets Policy (includes idle reduction)
SANTA BARBARA: Sustainability Action Plan (extracted pages pertaining to vehicle anti-idling policy)
SANTA BARBARA: Ordinance: Title 10: Transportation and Parking 10.48.095 Idling of Parked Vehicles. (page 252)
SANTA CRUZ: Anti-idling ordinance
In addition, an unknown number of municipalities have ordinances banning drive-thrus to reduce vehicle idling.
California Assembly Concurrent Resolution to protect children from vehicular idling
In 2016, the California legislature took an important step on behalf of school student health by adopting ACR 160. Sponsored by assemblymember David Hadley, this resolution addresses the issue of vehicular air pollution, specifically motor vehicle idling and children. This measure encourages motorists to not idle their motor vehicles near places where children congregate.
Why it is time for the State of California to extend the diesel commercial vehicle idling regulation to include light-duty vehicles.
Visit the Expanding Idling Regulation page for details!