• To take the generic theoretical framework specified in WP 2 and to develop the necessary domain-specific and complementary modelling systems and data sources to support a pilot application of the methods in London.

• In particular, to develop systems to enable the estimation of key indicators of urban mobility and the effectiveness of transport policy (e.g., share of trips by different modes of travel, the pattern of origin-destination movements) in London.

• To identify and document the difficulties and problems encountered in the domain specialisation of the generic theoretical methods, as an input to the refinement of the methods.

The initial task of WP4 will be to identify candidate transport data sources and modelling forms that may be used in conjunction with the theory to create a transport-specific methodology. This will be applied in more detail for London and Zurich in the later work packages (WP8 and WP9). The focus of the work will be on assessing the qualities and, if possible, improving the qualities of the models for use with various classes of data. This work includes considering approaches to treatment of modelling errors.

Building on current transport modelling practices, WP4 will specify and demonstrate sets of models that provide information from which the synthesising framework of WP2 can be used to generate synthesised data. In this way the approach will be to use data to improve models and to use the models to resolve problems of missing data. This represents a notable paradigm shift in reducing the distinction between data and models.

An aim of WP4 will be to widen the range of input data that can be used to synthesise transport information. Land use and economic modelling has a role in determining trip frequency. These models have always been associated with transport models, but only recently are being used more regularly. Economic information has relevance also to the synthesis of data on freight movements. Information on traffic and passenger flows from real-time sources is also becoming more available and use of this information is also an objective of WP4.