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The Handbook Emission Factors for Road Transport (HBEFA) is a Microsoft Access database application providing emission factors, i.e. the specific emissions in g/km, for all current road vehicle categories (passenger cars, light duty vehicles, heavy duty vehicles, buses, and motorcycles). Emission factors are provided for all regulated and the most important non-regulated air pollutants as well as for fuel consumption and CO2. HBEFA is used to estimate road transport emissions on different spatial aggregation levels from national to street level. HBEFA was originally developed on behalf of the Environmental Protection Agencies of (Germany (UBA) ), (Switzerland (FOEN/BAFU) ), and (Austria (Umweltbundesamt) ). In the meantime, further countries ((Sweden ), (Norway ), (France )) and the (JRC ) (Joint Research Centre of the European Commission) are supporting HBEFA. The handbook is developed and provided by (INFRAS ), a Swiss research institute and independent consulting group based in Zurich and Bern. HBEFA (the so-called “public version”) is available for download for everyone (chargeable at a fee of 250 EUR for new users). This public version allows users to view emission factors at different disaggregation levels. For selected experts participating in the development of HBEFA an extended version with additional features (referred to as “expert version”) is available. == Methodology == HBEFA consists of four sub-modules: # The emission factor database (expert version only) containing the base emission factors from various sources (such as vehicle emission measurements, emission factor models, etc.) # The fleet model (expert version only) providing weighting factors for the base emission factors in order to produce fleet compositions for a particular location (e.g. a country or a city) and a particular time period (one or more years). # The emission factor module (public and expert version) allowing access to the emission factor database by calculating weighted emission factors for particular traffic situations for a particular area and time period using the specified fleet compositions provided by the fleet model. # The emission model (expert version only) for the computation of overall emissions either on an aggregated spatial level for a particular area (e.g. a country or a city) or for a specific road network (“linkwise”). Inputs to the emission model are the description of the traffic activity (typically the vehicle kilometres travelled or the vehicle volume per road link) per vehicle category and the emission factors from the emission factor module. By multiplying these inputs the overall emissions are calculated. The emission factors in HBEFA are based on multi-national measurement campaigns financed by the (Environmental Protection Agencies of Germany ), (Switzerland ) and (Austria ), the Swedish Transport Administration, the Norwegian Environment Agency and the (French Environment and Energy Management Agency ) as well as the (Joint Research Centre ) (Research Centre of the European Commission). Programmes include roller bench measurements of vehicle emissions across all vehicle categories, size classes and emission stages. Furthermore, extensive analyses of driving behaviour are carried out. The country specific weighing of emission factors are based on extensive analyses of statistical base data (such as transport surveys, vehicle registration data, etc.). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Handbook Emission Factors for Road Transport (HBEFA)」の詳細全文を読む スポンサード リンク
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