Transport in Sudan during the early 1990s included an extensive railroad system that served the more important populated areas except in the far south, a meager road network, a natural inland waterway—the Nile River and its tributaries—and a national airline that provided both international and domestic service. Complementing this infrastructure was Port Sudan, a major deep-water port on the Red Sea, and a small but modern national merchant marine. Additionally, a pipeline transporting petroleum products extended from the port to Khartoum.

Sudan has 4,725 kilometers of narrow-gauge, single-track railways. The main line runs from Wadi Halfa on the Egyptian border to Khartoum and southwest to El-Obeid via Sennar and Kosti, with extensions to Nyala in Southern Darfur and Wau in Western Bahr al Ghazal, South Sudan. Other lines connect Atbara and Sennar with Port Sudan, and Sennar with Ad-Damazin. A 1,400-kilometer line serves the Al Jazirah cotton-growing region. There are plans to rehabilitate rail transport to reverse decades of neglect and declining efficiency. Service on some lines may be interrupted during the rainy season.