Core Components of Transportation
For transportation to take place, four core components are essential:
  • Modes. They represent the conveyances, mostly taking the form of vehicles that are used to support the mobility of passengers or freight. Some modes are designed to carry only passengers or freight, while others can carry both.
  • Infrastructures. The physical support of transport modes, where routes (e.g. rail tracks, canals or highways) and terminals (e.g. ports or airports) are the most significant components.
  • Networks. A system of linked locations that are used to represent the functional and spatial organization of transportation. This system indicates which locations are connected and how they are serviced. Within a network some locations are more accessible (more connections) than others (less connections).
  • Flows. Movements of people, freight and information over their respective networks. Flows have origins, intermediary locations and destinations. An intermediary location is often required to go from an origin to a destination. For instance, flying from one airport to another may require a transit at hub airport.