Transport in Cape Verde  Most transportation in Cape Verde is done by air. There are regular flights between the major islands (Santiago, Sal and São Vicente), with less frequent flights to the other islands. Boat transportation is available, though not widely used nor dependable. In the major cities, public bus transport runs periodically and taxis are common. In smaller towns, there are mostly hiaces and/or taxis. Railways: 0 km - There are no railways in Cape Verde. There was a short overhead conveyor system for salt from the open salt lake on Sal to the port at Pedra de Lume, and a short rail track to the pier at Santa Maria for similar purposes. Both are now disused. Roadways: "total:" 10,000 km including unpaved tracks accessible only to four wheel drive vehicles "asphalt:" 360 km "cobbled:" 5,000 km (2007 estimates)  The majority of Cape Verdean roads are paved with cobblestones cut from local basalt. Recent international aid has allowed the asphalting of many roads including all of the highway between Praia and Tarrafal, all of the highway between Praia and Cidade Velha, and all of the highway between Praia, Pedra Badejo, and Calheta de São Miguel on Santiago, and the dual carriageway between Santa Maria and Espargos on Sal. A new ring road has been built from Praia International Airport around the city of Praia. The primary method of intercity and inter-village transport for Cape Verdeans is by aluguer shared taxis, commonly called "Yasi", which is a derived from the name HiAce, because the Toyota HiAce is the most common shared taxi model. Few Cape Verdeans own cars, but ownership is rising rapidly with increasing prosperity, particularly on Santiago Island. Ports and harbors: Mindelo on São Vicente is the main port for cruise liners and the terminus for the ferry service to Santo Antão. A marina for yachts is undergoing enlargement (2007). Praia on Santiago is a main hub for ferry service to other islands. Palmeira on Sal supplies fuel for the main airport on the island, Amílcar Cabral International Airport, and is important for hotel construction on the island. Porto Novo on Santo Antão is the only source for imports and exports of produce from the island as well as passenger traffic since the closure of the airstrip at Ponta do Sol.