Brussels' modern and efficient public transportation system includes the metro, trams, premetro (trams that go underground for part of their journey) and buses, all run by the Société des Transports Intercommunaux de Bruxelles (STIB in French, MIVB in Flemish). Tickets are available at metro stations, STIB kiosks, some newsagents and on buses and trams. You can purchase single-trip tickets, five/ten-journey tickets or day passes. Metro stations are marked by rectangular signs with a white 'M' on a blue background. Tram and bus stops have red and white signs. There's no central hub for buses, so you'll want to pick up the STIB's free transportation map. Premetro trams run mainly between Gare du Nord and Gare du Midi. Trains are of minimal use within Brussels for visitors, except for getting to the airport. There are car rental companies at Gare du Midi, Brussels airport and around the city; the latter offer the cheapest prices. Driving in Brussels is not for the lily-livered - think aggressive drivers, potholes, cut-throat traffic loops and parking hassles. Taxis are metered and expensive; the tax and tips are figured into the meter price. Generally, you'll find taxis at all three major train stations, around the Grand Place and at place Stéphanie on Ave Louise. You can also call for a taxi from anywhere in the city.