Edited by Chris Nash
Chapter 9: Demand for road transport
This chapter deals with the demand for personal transport by road – that is, where the motivation for the road journey is to transport persons rather than freight. Freight transport is dealt with in a separate chapter (Chapter 11). In addition, the demand for public transport – some of which may be by road – is dealt with in a separate chapter (Chapter 10). Hence we are here essentially concerned with travel by private car (though other types of vehicle – vans, motorcycles – are also of relevance). As a result of this focus on car travel, it is clear that a primary requirement for investigating, analysing and forecasting the demand for road transport is a corresponding analysis of car ownership. The first section of the chapter thus discusses this topic in some depth. Given the level of car ownership, we then turn our attention to the use made of the vehicle – primarily in terms of kilometres travelled. Finally, we reflect on how this travel is distributed spatially: the pattern of use by type of road, and by type of area. Clearly this depends crucially on the level and condition of highway infrastructure, where variation between countries is much greater. In addition, because of the impact of congestion, we need to differentiate demand by time of day (and possibly weekday versus weekend).
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