Transportation Networks and Geographical Concentration
Transportation can be a factor of concentration. On the above figure, five locations are linked by a transportation network; one hub and four feeders. Without trade, each location has the same importance. With trade, a process of geographical concentration becomes possible. The hub location may see the convergence of movements and thus increase its importance, while the feeder locations may experience a decline. Many urban systems have been affected by such a process, as the largest cities, due to their location, grew faster than small and medium-sized centers. In addition of being a factors of concentration, transportation can be a factor of specialization.