Intercity travel is mainly by train and long-distance bus: Bucharest–Brașov, Brașov–Sibiu and Brașov–Sighișoara all have train and bus connections, but trains are generally slow with limited frequencies, and public transport between small towns and villages is sparse. The most practical way to go deep into Transylvanian villages, castles and mountains is to rent a car and drive yourself. Domestic flights connect Bucharest with large cities such as Cluj, but are not suitable for linking castle routes. Within cities, buses and trams predominate, with Bucharest also having a metro; bus 20 from Brașov to the Poiana Brașov ski resort costs on the order of a single-digit number of lei. Mountain roads are winding with poor lighting at night, and livestock and pedestrians may suddenly appear on rural sections — drive with particular care in rural areas at night. Motorways and some national roads have tolls and speed checks; fines start at hundreds of lei, subject to official announcements. When driving yourself, always carry passport, driving licence, rental and insurance documents, and prefer licensed car parks for parking. Fines for travelling without a ticket, illegal parking and the like are subject to official announcements.