ABSTRACT
This chapter begins with values of time savings and moves to consider modal-split forecasting. Recent developments in time valuation open the possibility of making valuations and modal split formally consistent. Increasing availability of labour-saving devices of all kinds has like effects. It seems probably that the independent effect of this is to reduce the value of time savings over the forecasting period. The most obvious implication is that the passage of time between observations should be noticed in attempted explanations of values of time. This need to keep the demand and supply sides of modal forecasting in explicit relation to each other, and to allocate effort accordingly, applies equally to inter-urban problems. Modal-use modelling is most critical when the issue is one of choice between future modes. It was suggested earlier that the need for improving the search process was a potentially strong purpose for development of modal-use modelling, and that this potential was greatest for urban areas.
