Samenvatting
A myriad of trips, each with its own origin, destination, and departure, time, interact on a network to produce an intrica pattern of traffic flows. The task of traffic flow theory is to weave a web of cause and effect - which given the triad of origin, destination, and departure time - can replicate the major features of what one would observe in reality. Traditionally, this theory has dealt with exceedingly simple origin-destination structures, a fact which may have limited it applicability. The aim of this paper is to remove this limitation.