Abstract
The results are presented of a study in which mobility developments in the Netherlands between 1984 and 1990 have been monitored. Monitoring means that average yearly changes are analyzed and explained. The method makes a comparison between the real developments and the results of predictions using the Mobility Explorer, which is a flexible model for medium term forecasting of mobility. Several key explanatory factors are used: demographic developments, car ownership, employment figures, national income, personal income, fuel prices and public transport fares. In some cases additional factors have been analyzed: supply factors, demand factors and ad hoc factors in order to explain developments satisfactory.