Transport enables trade between people, which is essential for the development of civilizations. Transport infrastructure consists of the fixed installations, including roads, railways, airways, waterways, canals and pipelines and terminals such as airports, railway stations, bus stations, warehouses, trucking terminals, refueling depots (including fueling docks and fuel stations) and seaports. In the transport industry, operations and ownership of infrastructure can be either public or private, depending on the country and mode.