Transportation Demand and Supply

Transportation Demand and Supply

The transportation is a service cannot be stored, it must be use immediately because unlike the resource it often carries. The transportation is a market composed of suppliers of transport services and users of these services. The mobility of transport infrastructures must have a fixed capacity to providing a transport supply. In several instances, transport demand is answered in the simplest means possible, especially by walking. The well-functioning transport markets should allow transport supply to meet transport demand so that transport needs for mobility are satisfied.

The transport demand is generated by the economy, which is composed persons, institutions and industries and which generates movements of people and freight. It is similar to transport supply which is expressed in terms of number of people, volume, or tons per unit of time and space. Transport demand can vary under two circumstances that are often concomitant, the quantity of passengers or freight increases, or the distance over which these passengers or freight are carried increases. Geographical considerations and transport costs account for significant variations in the composition of freight transport demand between countries. For the movements of passengers, the location of residential, commercial and industrial areas tells a lot about the generation and attraction of movements.

Generally over a geographically in transport supply, the capacity of transportation infrastructures and modes defined as a transport system and for a specific period of time. The transport supply is expressed in terms of infrastructures (capacity), services (frequency) and networks (coverage). Capacity is often assessed in static and dynamic terms where static capacity represents the amount of terminal surface and dynamic capacity are made the improvement of technology and management become efficiency. The number of passengers, volume for liquids or containerized traffic, or...