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The base year public transport (PT) demand matrix in WPTM was developed from observed data sources. As such, it is a highly reliable and accurate representation of current PT demand. This matrix would be expected to change as time goes by as the population changes and as the network develops. Therefore, for modelling future years and alternative networks, it is necessary to apply adjustments to the base PT matrix to reflect changes in trip generation, induction, suppression, redistribution and switch between car and PT.

WPTM does not have any built-in functions to forecast these changes. Therefore WPTM is linked to WTSM growth rates.

In this technical note (TN), the method by which demand matrix changes in WTSM are passed to WPTM is described.