Transport in Argentina is mainly based on a complex network of routes, crossed by relatively inexpensive long-distance buses and by cargo trucks. The country also has a number of national and international airports. The importance of the long-distance train is minor today, though in the past it was widely used. Fluvial transport is mostly used for cargo. Within the urban areas, the main transportation system is uy the bus or colectivo; bus lines transport millions of people every day in the larger cities and their metropolitan areas. Buenos Aires additionally has an underground, the only one in the country, and Greater Buenos Aires is serviced by a system of suburban trains.
A majority of people employ public transport rather than personal cars to move around in the cities, especially in common business hours, since parking can be both difficult and expensive. Cycling is not very common in big cities, as there are few bicycle-paths, making it difficult to move with them other than in recreational areas.
Since Argentina is almost 4,000 kilometres long and more than 1,000 km wide, long distance transportation is of great importance. Several toll expressways spread out from Buenos Aires, serving nearly half the nation's population. The majority of Argentine roads, however, are two-lane national and provincial routes and, though they are spread throughout the country, less than a third of Argentina's 230,000 km (145,000 mi) of roads are currently paved.
Though, by 1929, Argentina was already home to over 400,000 vehicles (more than half the total in Latin America, at the time), virtually all long-distance travel was done on the nation's vast railways. Argentina, then, lacked a road-building program until 1932, when the National Highway Directorate was established. Paid for at first with an excise tax on gasoline, the bureau could claim some important accomplishments, like the 1951 opening of the 200 km Santa Fe-Rosario expressway, Latin America's first.