Transport in Spain is characterised by an extensive network of roads, railways, rapid transit, air routes, and ports. Its geographic location makes it an important link between Europe, Africa, and the New World. Major forms of transit generally radiate from the capital, Madrid, located in the centre of the country, to link with the capitals of the autonomous communities.Spanish transit is marked by a high degree of integration between its long-distance railway system and inner-city metro systems, although the historic use of broad gauge has limited integration with its neighbours. Spain is currently working to increase and improve linkage with the rail systems of France and Portugal, including high-speed rail between Madrid and Lisbon. Cities and provincial capitals all have reasonable bus networks. You can buy single tickets (usually between €1 and €2) on the buses or at estancos (tobacconists), but in cities such as Madrid and Barcelona, you are better off buying combined 10-trip tickets that allow the use of a combination of bus and metro, and which work out cheaper per ride. These can be purchased in any metro station and from some tobacconists and newspaper kiosks. Regular buses run from about 6am to shortly before midnight and even as late as 2am. In the big cities, a night bus service generally kicks in on a limited number of lines in the wee hours. In Madrid they are known as búhos (owls) and in Barcelona more prosaically as nitbusos (night buses).