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Tractor-Trailer GHG Final Regulation
Tractor-Trailer GHG Program Page

Regulation Applies To:
  • - Applies primarily to owners of 53-foot or longer box-type trailers, including both dry-van and refrigerated-van trailers, and owners of the heavy-duty tractors that pull them on California highways.
  ► Exempt Trailer-Types: ▼ Exempt Trailer-Types:
  • - Trailers less than 53 feet
    - Drayage tractors and trailers that operate within a 100 mile radius of a port or intermodal rail yard.
    - Curtain side vans
    - Solid waste vehicles
    - Drop frame vans
    - Container chassis

  • - Low-rolling resistance tires (LRRTs) are required on all 2010 MY or newer tractors and trailors. For 2010 MY and older equipment: All tractors required to have LRRTs by Jan. 1, 2013. All trailers required by Jan. 1, 2017.
  • - Aerodynamic devices are currently required on all 2010 MY or newer sleeper-cab tractors and trailers. Aerodynamic devices are also currently required for 2010 MY and older trailers, unless you already registered and are following a phase-in plan.

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Financial Assistance

Small Fleets (20 or fewer trailers): Registration has closed for the small fleet provision, which required trailer owners to report  by January 1st, 2013.

  • Large Fleets (21 or more total trailers): Registration has closed for the Large Fleet Phase-in Option 1 and Option 2, which required trailer owners to report by July 1, 2010, and June 1, 2012, respectively.

  • Refrigerated-van trailers that are model year 2003 to 2009 AND equipped with 2003 or newer model year transport refrigeration unit (TRU) engines may delay requirements for the GHG regulation.


Upcoming Deadlines:


January 1, 2016 January 1, 2016
  • - Large fleets must meet 100%.
  • - Small fleets must meet 75%.

January 1, 2017 January 1, 2017
  • - Low Rolling Resistance Tires required on trailers.
  • - Small fleets must meet 100%.
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