Abstract
A new approach to studying the demand for intercity freight transport is proposed. The approach utilises a switching simultaneous equations system to derive a discrete/continuous choice model for the choices of mode and shipment size in the intercity freight market. The method is applied to a study of the demand for intercity freight transport using data from the US Census of Transportation. Empirical results have supported the notion of simultaneous decision-making regarding the choices of mode and shipment size. (Author/publisher).