These baselines are based on data available in NTMCalc 4.0, literature reviews and expert interviews. The settings aim to reflect on general road traffic by bus. In general we recommend use of real data if available at sufficient quality. NTM default data are conservatively assessed and should if used thereby not enable low emission calculations. Furthermore they should promote actual used buses real data in relation to NTM default data, hence being used in the procurement of bus services.

Clarifications and abbreviations

NTM name

Describes type of bus

Fuel

Describes type of fuel used.  Average diesel fuel and B5 refers to 5% biodiesel

Engine

Refers to emission standard

Road gradient

Describe road topography as this has an influence on fuel consumption

Occupancy

Relates to the average number people in the bus.

Use weight

Is used to artificially design an average bus based on weigthed average of all options.

Energy

Use of energy, including fuel production/ distribution and the combustion (wtw). Only combustion is ttw.

CO2e

Emissions of carbon dioxide equivalents including fuel production, distribution and the combustion (wtw).

CO2 fossil

Emissions of fossil carbon dioxide in the combustion phase (ttw).

Sources

NTMCalc 4.0; www.transportmeasures.org

Handbook for emission factors www.hbefa.net