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    Regulations


  The list below includes ARB regulations that apply to heavy-duty diesel vehicles operating in California.  

Regulations Within Truckstop

► Auxiliary Power Unit (APU) ▼ Auxiliary Power Unit (APU)
  • - Used as a separate power source for cab comfort on sleeper births. Diesel-fueled auxiliary power units use small diesel engines to generate power for cab heating, cab cooling, and operating ancillary cab appliances. These units can also be used to heat the engine block in cold weather and recharge the vehicle's battery. Because of the engine's smaller size, operating a diesel-fueled auxiliary power unit uses only a fraction of the fuel that would be used by idling the vehicle's primary engine.
    - A diesel-fueled auxiliary power unit operated on a truck equipped with a 2007 or newer engine must:
    - Be fitted with a verified Level 3 particulate control device (85% particulate reduction efficiency), or
    - Have its exhaust plumbed into the vehicle's exhaust system upstream of the particulate matter aftertreatment device.
    - In addition, an approved "Verified Clean APS" label must be affixed to the hood of the vehicle. Note: For trucks with 2007 and newer model year engines, additional requirements apply. For trucks with 2006 and earlier model year engines, any California- or federally-certified internal-combustion auxiliary power system may be used.
    Regulatory Program Website
    Exhaust Retrofit Guidance (Filters)

► Drayage (Port or Rail Yard) Trucks ▼ Drayage (Port or Rail Yard) Trucks
  • - Drayage trucks are defined as on-road heavy-duty diesel-fueled class-7 and class-8 (GVWR greater than 26,000 lbs.) trucks that transport cargo, containers, or chassis ultimately going to or coming from a port or intermodal railyard in California. The regulation applies to all drayage trucks regardless of the state or country of origin or visit frequency.
    - The regulation requires emission reductions from drayage trucks. The emission reduction requirements were phased-in starting January 1, 2010.
    - The regulation also requires registration in the Drayage Truck Registry (DTR) prior to port or rail yard entry. See the ‘Drayage Truck Fact Sheet’ and ‘Regulation Website’ links below for additional information and how to register your truck.
    - If you are unsure if your vehicle is subject to the Drayage Regulation or the Truck and Bus Regulation see the Drayage vs. Truck and Bus Regulations flow chart.
    Regulatory Program Website
    Drayage Truck Fact Sheet
    Drayage Truck Registry Fact Sheet
    Exhaust Retrofit Guidance (Filters)

► Emission Control Label Inspection Program ▼ Emission Control Label Inspection Program
  • - Each vehicle operating in California - including those in transit from Mexico, Canada, or any other state – must have a label, called an Emission Control Label, showing that the engine met the required federal emission standards applicable for the model year of the engine.
    - The program establishes inspection protocol for determining whether the engine of a heavy-duty vehicle met the federal emission standard applicable to the engine's model year at the time of manufacture.
    - Vehicles equipped with engines that do not meet the applicable federal emission standard are prohibited from operating in California. - Engines that are missing their ECL are subject to civil penalties.
    Regulatory Program Website
    Emission Control Label Advisory
    How to find the ECL/Emission Control Label on a truck and other questions answered


► Heavy-Duty Diesel Vehicle Inspection Program (HDVIP) ▼ Heavy-Duty Diesel Vehicle Inspection Program (HDVIP)
  • - The HDVIP program requires heavy-duty trucks and buses to be inspected for excessive smoke and tampering, and emission control label compliance.
    - Any heavy-duty vehicle traveling in California, including vehicles registered in other states and foreign countries, may be tested.
    - Tests are performed by ARB inspection teams at border crossings, CHP weigh stations, fleet facilities, and randomly selected roadside locations.
    Regulatory Program Website
    HDVIP Brochure

► Idling Reduction Program ▼ Idling Reduction Program
  • - Applies to heavy-duty diesel engines with a gross vehicle weight rating (GVWR) greater than 10,000 lbs. that operate on California highways including operators of both in-state and out-of-state registered sleeper berth equipped trucks.
    - Requires manual or automatic shutdown after five minutes of idling.
    - 2008 and newer model year engines must be equipped with a non-programmable engine shutdown system that automatically shuts down the engine after five minutes of idling.
    - Immediate shutdown is required at or within 100 feet of a school or school activity site. Restart no more than 30 seconds before departing, regardless of fuel type.
    Commercial Idling Regulatory Program Website
    Commercial Idling Fact Sheet
    School Zone Idling Regulatory Program Website
    School Zone Idling Fact Sheet

► Periodic Smoke Inspection Program (PSIP) ▼ Periodic Smoke Inspection Program (PSIP)
  • - All California-based fleets of two or more heavy-duty diesel vehicles (gross vehicle rating over 6,000 pounds) are required to perform annual smoke and tamper inspections of their fleet vehicles and repair those with excessive smoke. All vehicles that do not pass the test must be repaired and retested.
    - Beginning January 2010, diesel vehicles manufactured after1997 with a gross vehicle weight rating (GVWR) of 14,000 pounds or less are included in the California Smog Check Program. The Smog Check Program requires vehicles to receive a biennial Smog Check. The Smog Check is required for the registration of the vehicle by the Department of Motor Vehicles (DMV) or for change of ownership.
    - 1998 and newer diesel powered vehicle garaged in an air quality non-attainment area of the state with a GVWR of 14,000 pounds or less, are NOT subject to the requirements of the PSIP any longer. They ARE subject to biennial smog check inspections.
    - 1998 and newer diesel powered vehicle garaged in an air quality attainment area of the state with a GVWR of 14,000 pounds or less, are NOT subject to biennial smog check inspections but ARE required to have a passing PSIP inspection on a BIENNIAL BASIS.
    - 1997 model year or earlier diesel powered vehicles with a GVWR between 6,000 and 14,000 pounds are still subject to the ANNUAL PSIP inspection and record keeping requirements.
    - Fleet owners are not required to inspect vehicles that are powered by diesel engines until their fourth model year (example: 2000 year engines must have their first test completed in 2004).
    - Smoke inspection and maintenance records must be kept by the fleet for two years.
    - The ARB randomly audits fleets, to examine smoke inspection and maintenance records and may test a representative sample of vehicles.
    Regulatory Program Website
    Periodic Smoke Inspection Program Brochure

► Public Agency and Utility Regulation ▼ Public Agency and Utility Regulation
  • - Any municipality or utility that owns, leases, or operates an on-road diesel-fueled heavy-duty vehicle with a 1960 to 2006 model-year heavy-duty engine or a 2007 model-year or newer engine certified to greater than 0.01 grams per brake horsepower-hour particulate emission standard and manufacturer’s GVWR greater than 14,000 pounds.
    - A municipality is defined as a city, county, city and county, special district, or a public agency of the State of California, and any department, division, public corporation, or public agency of this State, or two or more entities acting jointly.
    - A utility is defined as a privately-owned company that provides the same or similar services for water, natural gas, and electricity as a public utility operated by a municipality.
    - Requires particulate emission reductions by applying best available control technology (BACT) to vehicles according to a specified implementation schedule. Please use the ‘Public Agency and Utility Fact Sheet’ link below for additional information on BACT.
    - Fleets located in low-population counties may elect to follow the low-population implementation schedule, which provides more time to comply with BACT compared to fleets located in larger counties. Municipalities or utilities not located in low-population counties may qualify for low-population county status provided certain criteria are met and their operations are not supported by a special district assessment or fee. More information on low-population county status is available at: http://www.arb.ca.gov/msprog/publicfleets/lpcapplication.doc.
    - Owners must apply compliance status labels to vehicles and maintain vehicle records.
    Regulatory Program Website
    Public Agency and Utility Fact Sheet
    Exhaust Retrofit Guidance (Filters)

► Public Transit Agency Regulation ▼ Public Transit Agency Regulation
  • - Public transit agency-A public entity responsible for administering and managing transit services. Public transit agencies can directly operate transit service or contract out for all or part of the total transit service provided.
    - Urban bus- A passenger carrying vehicle owned or operated by a public transit agency, powered by a heavy heavy-duty engine, or of a type normally powered by a heavy heavy-duty diesel engine, intended primarily for intra-city operation. A bus normally powered by a heavy heavy-duty diesel engine is usually 35 feet or longer, and/or greater than 33,000 pounds GVWR.
    - Transit Fleet Vehicles- An on-road vehicle greater than 8,500 pounds gross vehicle weight rating (GVWR) powered by a heavy-duty engine fueled by diesel or alternative fuel, owned or operated by a transit agency, and which is not an urban bus.
    - Requires annual reporting to ARB on or by January 31st.
    Regulatory Website
    Urban Bus Fact Sheet
    Transit Fleet Vehicle Fact Sheet
    Exhaust Retrofit Guidance (Filters)


► Solid Waste Collection Vehicle Regulation ▼ Solid Waste Collection Vehicle Regulation
  • - Any on-road heavy-duty vehicle with a manufacturer’s GVWR greater than 14,000 pounds used for the purpose of collecting residential and commercial solid waste for a fee, regardless of the type of vehicle (i.e. dump-truck, roll-off-truck, box-truck, etc). Required to maintain fleet reports on site and submit to ARB upon request.
    - Requires particulate emission reductions by applying best available control technology (BACT) to vehicles according to a specified implementation schedule. Please use the ‘Solid Waste Collection Vehicle Fact Sheet’ link below for additional information on BACT.
    Regulatory Program Website
    Solid Waste Collection Vehicle Fact Sheet
    Exhaust Retrofit Guidance (Filters)


► Truck and Bus Regulation ▼ Truck and Bus Regulation

Regulations Outside of Truckstop:

Off-Road Diesel Vehicle Regulation

Off-Road Mobile Agriculture Equipment Regulation

Portable Equipment Registration Program (PERP)

Menu Of All ARB Diesel Programs & Activities

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