Transport in Western Sahara is very limited by sea, road and air with camels being the primary means of transportation in the desert area.[1] Road transport by buses remain the major mode of transportation. The longest conveyor belt in the world is 100 kilometres (62 mi) long, from the phosphate mines of Bu Craa to the coast south of Laayoune. The belt moves about 2,000 metric tons of rock containing phosphate every hour from the mines to El-Aaiun, where it is loaded and shipped.
Portions of Western Sahara were a Spanish Colony until 1975 as the last colonial province in Africa. A war erupted between those countries and the Sahrawi national liberation movement, the Polisario Front, which proclaimed the Sahrawi Arab Democratic Republic (SADR) with a government in exile in Tindouf, Algeria. Mauritania withdrew in 1979, and Morocco eventually secured control of most of the territory, including all the major cities and natural resources. A UN brokered ceasefire was implemented from 1991 between Polisario and Moroccan forces.
The world's longest cargo train, the Mauritania Railway cargo train, crosses the southeastern corner of Western Sahara for a short distance. Transit through Western Sahara was disrupted during the war between Polisario and Moroccan forces before the ceasefire was implemented in 1991.