Teams from Bouygues Bâtiment Equatorial Guinea, a joint subsidiary of DTP and Bouygues Bâtiment International, have built an 84-kilometre stretch of four-lane motorway linking the port city of Bata, in the west of the country, and Ayak Ntang, in the centre. One of the biggest challenges to overcome was the geotechnical diversity of the terrain (marshes, mangrove swamps and a mountainous region to cross). 2,000 workers and 1,000 items of plant and equipment were required for this imposing project.