Chad 24°E. Chad is bounded to the north by Libya, to the east by Sudan, to the west by Niger, Nigeria and Cameroon, and to the south by the Central African Republic. The country's capital is from the nearest seaport, Douala, Cameroon. Because of this distance from the sea and the country's largely desert climate, Chad is sometimes referred to as the "Dead Heart of Africa". The dominant physical structure is a wide basin bounded to the north and east by the Ennedi Plateau and Tibesti Mountains, which include Emi Koussi, a dormant volcano that reaches above sea level. Lake Chad,
A3 highway (Nigeria) Gamboru-Ngala Local Government conveying commodities from the two countries are now left stranded on either sides of the bridge. On May 13, 2014, the House of Representatives "called on the Federal Government to rebuild the Gamboru Bridge linking the border town with other parts of Borno State." A3 highway (Nigeria) The A3 highway is a highway in Nigeria. It runs generally north from Port Harcourt through Aba, Umuahia, Okigwe, Enugu, Ngwo, Makurdi, Lafia, Jos, Bauchi and Potiskum thence east via Damaturu, Maiduguri to the border with Cameroon at Gambaru. The continuation through Cameroon connects to N'Djamena, the capital of Chad.