TRL was commissioned by the Department for Transport to review the approach used in the National Atmospheric Emissions Inventory (NAEI) for estimating emissions from road vehicles, and to propose new methodologies. This necessarily requires that some consideration be given to the emission measurement process, an important aspect of which is the definition and application of driving cycles to represent different types of vehicle operation.
This Reference Book represents an attempt to compile a unique document which contains detailed descriptions of more than 200 driving cycles in a standardised format. Emphasis has been given to those driving cycles and vehicle operations that are relevant to the UK. The Reference Book was designed for use primarily within the DfT project. However, it is also hoped that it will be a useful source of information for other researchers and practitioners in the fields of vehicle emissions and air pollution.

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