Forecasting regional policies implies two premise types. The first type concerns exogenous characteristics such as population growth or economic development. The second type concerns specific transport aspects such as parking policies or extension of the car network. With the aid of the New Regional Model (NRM) Growth Model some first order effects have been calculated for the Dutch province of North Brabant. It appeared that forces like population growth have a large influence upon the aggregate results. Policies such as parking tariffs have, on a provincial level, hardly any influence on the outcomes, although they do on a local level. When interpreting a mobility forecast one often refers to the current mobility forecast one often refers to the current mobility situation. The current mobility situation is a point in time between base year and forecast year. One may ask to what extent the traffic policies have (already) made an impact upon the current mobility situation in order to make a proper judgement about the forecasts. Questions might be raised as to whether the traffic policies have already been implemented and whether the premises about the erogenous characteristics are still acceptable. (A)
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