A single pipeline leads from South Sudan's oil fields to (north) Sudan's only seaport, Port Sudan.
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The pipeline connects the oil fields of the Melut Basin with the refinery and export terminal located at Port Sudan on the Red Sea.
They were used on Port Sudan to Atbara and Atbara to Wad Madani routes, until they were made redundant by diesel locomotives.
In the mid-1970s, IDA and the Saudi Development Fund agreed to make funds available for construction of new airports at Port Sudan and Wau, reconstruction and improvement of the airport at Malakal, and substantial upgrading of the Juba airport; these four airports accounted for almost half of domestic traffic.