Emission factors 2009: Report 3 - exhaust emission factors for road vehicles in the United Kingdom

TRL Limited was commissioned by the Department for Transport to review the approach used in the National Atmospheric Emissions Inventory (NAEI) forestimating emissions from road vehicles, and to propose new methodologies. This Report describes the development of new exhaust emission factors. Emission data for light-duty vehicles (LDVs) and heavy-duty vehicles (HDVs)from various European test programmes were collected. The methods used for determining emission factors are described in detail. Separate databaseswere compiled for LDVs and HDVs, and in each case for regulated and unregulated pollutants. For LDVs the emission factors for regulated pollutants were developed from the relevant databases for vehicles complying with pre-Euro 1 to Euro 6 emission standards. For HDVs the emission factors for regulated pollutants were not calculated from the corresponding database; inorder to provide greater flexibility they were based upon the average-speed functions from the European ARTEMIS project. The emission factors for HDVs covered the pre-Euro I to Euro VI emission standards. For petrol and diesel cars the CO2 emission functions were derived from the type approval data for new cars. The emission factors for mopeds were taken from the COPERT 4 model, and those for motorcycles were taken from ARTEMIS. The unregulated pollutants considered were methane, 1,3-butadiene, benzene, nitrous oxide, ammonia, polycyclic aromatic hydrocarbons, nitrogen dioxide and particle size fractions. The emission factors for these pollutants were basedupon a combination of the relevant databases and the literature. (A)

  • Availability:
  • Authors:
    • BOULTER, P G
    • BARLOW, T J
    • MCCRAE, I S
  • Publication Date: 2009


  • English

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  • Accession Number: 01149005
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jan 25 2010 9:12AM