For transportation network mathematical graph theory, see Flow network.
A transport network, or transportation network, is a network of roads, streets, railways (or railroads), pipes, aqueducts, power lines, or nearly any structure which permits either vehicular movement or flow of some commodity. There are many types of transport networks they are:land sea and air Transport network analysis is used to determine the flow of vehicles (or people) through a transport network, typically using mathematical graph theory. It may combine different modes of transport, for example, walking and car, to model multi-modal journeys. Transport network analysis is within the field of transport engineering.