Off-Road Diesel Models and Documentation

Contact

Please use the OFFROAD2021 Web Query Tool to access the latest outputs.

Off-Road Diesel Engine Emissions Factors

Agricultural Equipment

A New Holland tractor with a Krause disc harrow attached sits on farmland

Cargo Handling Equipment (CHE)

Cargo handling equipment with containerized goods at Howard Terminal, Port of Oakland
  • Equipment Class: Equipment used at ports and intermodal rail yards
  • Includes: Diesel, propane, gasoline, and electric equipment
  • Data Sources: Inventory is based on 2019 reports from Port of Los Angeles, Port of Long Beach, and Port of Oakland, and 2019 data reported to CARB for intermodal railyards and ports not previously listed.
  • Emissions Inventory
  • Additional Links

Construction, Mining, Industrial and Oil Drilling Equipment over 25hp, Diesel, Subjected to In-Use Regulation

Construction workers work with an excavator at N and 11th streets near Capitol Park in Sacramento. April 6, 2022
  • Equipment Class: Self-propelled equipment used in all off-road applications (except for agriculture), this includes but is not limited to construction, mining, oil drilling and industrial
  • Includes: Over 25 horsepower, self-propelled, diesel equipment only
  • Emissions Inventory
  • Additional Links
  • Data Sources: Inventory based on DOORS reporting data from 2008/2009. Growth is based on construction-starts forecast, updated in 2011

Construction, Mining, Industrial and Oil Drilling Equipment, Diesel and Gasoline of all horsepower, Not Subject to In-Use Regulation

Common factors diagram 
    • Equipment Class: Construction and mining and industrial equipment such as small backhoes, mini-excavators or other small equipment, forklifts, etc.
    • Includes: Diesel under 25 horsepower, or gasoline of all horsepowers, self-propelled
    • Data Sources: Inventory is based on the Off-Road 2007 model

    Commercial Harbor Craft (CHC)

    Tug boat in Carquinez Strait, near Vallejo. October 23, 2018.

      Forestry Equipment

      Forestry Equipment

       

      • Equipment Class: Forestry equipment includes mobile equipment used for on-site logging and mill operations.
      • Includes: self-propelled diesel equipment of all horsepowers
      • Data Sources: Forestry-specific statewide survey, on-site operations and mill logging activity, timber harvest statistics, and geographical information on logging activities. 
      • Emissions Inventory

      Large Spark-Ignition (Forklift) Equipment 

      Forklift on the road.

      • Equipment Class: Large Spark-Ignition (LSI) equipment includes forklifts, sweeper/scrubbers, and tow tractors used in industrial operations including but not limited to manufacturing, wholesale, transportation and utilities, and retail.
      • Includes: natural gas and gasoline-powered equipment of all horsepowers
      • Data Sources: DOORS 2020 LSI Database, DOORS 2020 Fleet Surveys, Fullerton Survey, 2020 ITA California and National Forklift Sales, and Census survey on industrial warehouse space.
      • Emissions Inventory:

      Locomotives

      Wilmington San Bernardino Rail yard

      Ocean Going Vessels

      Large containership at berth at the Port of Los Angeles. 

      Portable Equipment OVER 50 Hp, Diesel, Subject to Portable ATCM (Updated, October 2017)

      Common factors diagram 

      Portable Equipment UNDER 50 Horsepower, Diesel and Gasoline, Not Subject to Portable ATCM

      Common factors diagram 
      • Equipment Class: Portable Engines
      • Includes: Diesel under 50 horsepower, or gasoline of all horsepowers, portable (not self propelled, not stationary)
      • Data Sources: Inventory is based on the OFFROAD2007 model

      Transport Refrigeration Units (TRU)

      Truck trailers with TRUs sit parked in truck bays
      • Equipment Class:Transport Refrigeration Units (TRUs)
      • Includes: All Horsepower (all under 50hp), TRUs for trucks, trailers, containers, all fuels (currently only diesel)
      • DRAFT 2019 Emission Inventory Methodology: For public comment prior to official release in Summer 2020
      • Data Sources: 2011 ARBER TRU Reporting Database
      • Emissions Inventory
      Off-Road Gas Equipment