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 transportation 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. The frequency and regularity of publicly accessible ground transport services vary between the islands and municipalities, however there are some common features that can be found throughout Cape Verde. The primary mode of transport between municipalities is via shared minibuses commonly referred to as a "yasi", because of the Toyota HiAce which makeup the majority of the minibuses in service. While 12-14 passenger "yasi" class minibuses connect the major municipalities at their end points, modified pickup trucks with partially covered cabs and benches installed in the back transportation passengers along shorter distances through minor municipalities and the rural areas in between.