The Trans–West African Coastal Highway or TAH 7 is a transnational highway project to link 12 West African coastal nations, from Mauritania in the north-west of the region to Nigeria in the east, with feeder roads already existing to two landlocked countries, Mali and Burkina Faso.

Reconstruction of the segment in Lagos, Nigeria began in 2010, and when it is complete that section will be ten lanes wide.

Please note that a paved alternate route Dakar-Bamako-Abidjan (shown in black on map) is more practical.

[2] Note: 'spur' indicates the city is on a spur off the main alignment of the highway, 'existing' could mean a pre-existing national road has been adopted for the route or a section has been newly constructed.

[4] Two other transnational roads are also under development from Lagos to link to the Trans–West African Coastal Highway:[4]