Transportation Supply Models

  • Ennio Cascetta
Part of the Applied Optimization book series (APOP, volume 49)


This chapter deals with the mathematical models simulating transportation supply systems. In broad terms a transportation supply model can be defined as a model, or rather a system of models, simulating the performances and the flows resulting from users’ demand and the technical and organizational aspects of the physical transportation supply. The general structure of a supply model is depicted in Fig. 2.1.1, where several elements (or sub-models) can be distinguished. The graph defines the topology of the connections allowed by the transportation system under study, while the network loading or flow propagation model defines the relationship among path and link flows. The link performance model expresses for each element (link) the relationships between performances, physical and functional characteristics, and flow of users. The impact model simulates the main external impacts of the supply system. Finally, the path performance model defines the relationship between the performances of single elements (links) and those of a whole trip (path) between any origin-destination pair.


Queue Length Road Segment Link Cost Link Performance Traffic Stream 


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Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  • Ennio Cascetta
    • 1
  1. 1.Dipartimento di Ingegneria dei Trasporti “Luigi Tocchetti”Università degli Studi di Napoli “Federico II”NapoliItaly

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