Iran has long paved road system linking most of its towns and all of its cities. In 2007 the country had 178,152 km (111,000 mi) of roads, of which 66% were paved. In 2008 there were nearly 100 passenger cars for every 1,000 inhabitants.[1]Trains operated on 11,106 km (6,942 mi) of railroad track.[2] The country’s major port of entry is Bandar-Abbas on the Strait of Hormuz. After arriving in Iran, imported goods are distributed throughout the country by trucks and freight trains. The Tehran-Bandar-Abbas railroad, opened in 1995, connects Bandar-Abbas to the railroad system of Central Asia via Tehran andc Mashhad. Other major ports include Bandar e-Anzali and Bandar e-Torkeman on the Caspian Sea and Khorramshahr and Bandar-e Emam Khomeyni on the Persian Gulf.Dozens of cities have airports that serve passenger and cargo planes. Iran Air, the national airline, was founded in 1962 and operates domestic and international flights. All large cities have mass transit systems using buses, and several private companies provide bus service between cities. Tehran, Mashhad, Shiraz, Tabriz, Ahwaz and Esfahan are in the process of constructing underground mass transit rail lines.