The paper provides an overview of the main features of a Vehicle Market Model(VMM)which estimates changes to vehicles stock/kilometrage, fuel consumed and CO2 emitted. It is disaggregated into four basic vehicle types. The model includes: the trends in fuel consumption of new cars, including the role of fuel price; a sub-model to estimate the fuel consumption of vehicles on roads characterised by user-defined driving cycle regimes; procedures that reflect distribution of traffic across different area/road types; and the ability to vary the speed(or driving cycle)from one year to another, or as a result of traffic growth.
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