Driving conditions in Costa Rica are known for being difficult. The road network is under-maintained in places and known to get muddy in the rainy season. Car rentals are, however, available.Mini-van taxis can be arranged through most hotels. Taxi cabs are also readily available; official taxis are red with a sign on the roof and a yellow triangle on the side. Taking unregistered taxis is not advisable. Passengers should ensure that the meter is switched on at the beginning of the journey; if there is no meter, a fare should be negotiated before setting off.Various bus services run throughout the city, but the system can be confusing for foreigners. Some buses can be booked ahead of time although many operate on a first-come, first-served basis. Buses are the cheapest form of transport in Costa Rica but can be slow and overcrowded.INCOFER, the national railway carrier, runs several railway lines although these are not as extensive or frequently used as other modes of transport. A specialised tourist line runs from San Jose to Cartago.