Syria's railway service is reliable and inexpensive, but only first class is air-conditioned. The railway extends 3,735 km of which 1,785km are of standard gauge, the rest narrow gauge. The main internal railway route connects Damascus with Aleppo, Deir ez-Zur, Hassake and Qamishle, with a secondary, coastal route from Aleppo to the port of Lattakia. International routes links via Istanbul and Ankara (Turkey). Change at Ankara for the Taurus Express to Aleppo and there is a connection from Aleppo to the Lebanese border. The connection from Damascus to Amman (Jordan) has been suspended since 1983.