The Algerian road network is the densest in Africa; its length is estimated at  of highways, with more than 3,756 structures and a paving rate of 85%. This network will be complemented by the East-West Highway, a major infrastructure project currently under construction. It is a 3-way,  highway, linking Annaba in the extreme east to the Tlemcen in the far west. Algeria is also crossed by the Trans-Sahara Highway, which is now completely paved. This road is supported by the Algerian government to increase trade between the six countries crossed: Algeria, Mali, Niger, Nigeria, Chad, and Tunisia.