The country had 3,800 km (2,361 mi) of roads in 2002; at least 1,064 km (661 mi) were tarred. A highway runs between the southern boundary with South Africa and the eastern boundary with Mozambique. There were 30,000 passenger cars and 9,000 commercial vehicles in use in 1995. The 297-km (184-mi) Swaziland Railway (71 km/44 mi of which were not in use as of 2001) links iron mines at Ngwenya with the Mozambique Railway and the port of Maputo in Mozambique. In the 1970s, a 94-km (58-mi) southern spur was constructed to the South African border. A 115-km (71-mi) northern spur to the South African border was completed in 1986. Airports numbered 18 in 2001, only 1 of which had a paved runway. Matsapa Airport, near Manzini, provides service—via Royal Swazi National Airways—to South Africa, Mozambique, Zambia, Malawi, Zimbabwe, Botswana, Kenya, and Tanzania. In all, 89,500 passengers were carried on scheduled international and domestic flights in 2001.