São Gonçalo and Maricá, commute to Rio de Janeiro to study and work. There are several ferry services that operate between the Rio Centro (Praça XV) and Niterói (Centro and Charitas). There is a traditional boat as well as several "fast cat" hydrofoil boats. One of the city neighborhoods is Paquetá Island, which can only be accessed by ferryboats or hydrofoil boats. The ferryboat to Paquetá leaves every hour, from early in the morning until around midnight. There is also a ferry to Cocotá. Buses City buses cost about R$3.80 to ride. They come in both non-air conditioned (R$3.80) and air conditioned versions (R$3–R$5.40). The system may be relatively safe by day but less so at night. Integration of bus lines has been recently implemented, allowing users to take two non-air conditioned bus rides in two hours paying just one ticket. It is necessary to have a registered electronic card (the "Bilhete Único Carioca (BUC)") in order to benefit of this system. Another type of local bus is called the "Frescão" (air-conditioned). These buses run several routes, the main being from Centro through Botafogo, Copacabana and Ipanema to Leblon (and vice versa), and from the International Airport to Barra, through the beach road. They are air conditioned – about – more upscale/comfortable and cost between R$6.00–R$12.00. However, it is only available during weekdays. The buses also run more frequently during the rush hours in the morning and evening. Going in the direction of Centro (city center), the bus can be flagged down on the beach road (buses with plaques showing "Castelo"). Road transport Driving in Rio de Janeiro, as in most large cities of Brazil, might not be the best choice because of the large car numbers. The city is served by a number of expressways, like Linha Vermelha, Linha Amarela, Avenida Brasil, Avenida das Américas and Avenida Infante Dom Henrique (Aterro do Flamengo); in spite of this, traffic jams are very common. Because of the organization of the 2016 Olympics the city is installing four BRT systems to link Barra da Tijuca with other major neighborhoods: TransOlimpica (between Barra and Deodoro); TransBrasil (over the Avenida Brasil expressway); TransCarioca (between Barra and the Galeão International Airport); and TransOeste (between Barra and Santa Cruz, over Avenida das Américas). In Brazil, most interstate transportation is done by road. A large terminal for long-distance buses is in the Santo Cristo neighborhood of Rio