In 2002, railroads consisted of 1,328 km (825 mi) of track, not including industrial lines. Highways totaled 20,000 km 12,428 mi) in 2002, including 13,900 km (8,637 mi) of paved roads. Moldova has 424 km (263 mi) of inland waterways. Access to the sea is through Ukraine or Romania. There were 30 airports in 2001, seven with paved runways. Air transport is provided by Air Moldova International and Moldavian Airlines, both private carriers, and a state company, Air Moldova. In 2001, 120,100 passengers were carried on domestic and international airline flights.