Abuja the city of Abuja had a population of 776,298, making it one of the ten most populous cities in Nigeria. According to the United Nations, Abuja grew by 139.7% between 2000 and 2010, making it the fastest growing city in the world. , the city is experiencing an annual growth of at least 35%, retaining its position as the fastest-growing city on the African continent and one of the fastest-growing in the world. As at 2016, the metropolitan area of Abuja is estimated at six million persons, placing it behind only Lagos, as the most populous metro area in Nigeria.
Transport in the Central African Republic Transport in the Central African Republic Modes of transport in the Central African Republic include road, water, and air. Most but not all of the country is connected to the road network, much of which is unpaved, and which centres on the "routes nationales" identified as RN1 to RN11. Bangui serves as a seaport, and 900 km of inland waterways are navigable, the main route being the Oubangui river. There is one international airport at Bangui-Mpoko, two other paved airports, and over 40 with unpaved runways. There are presently no railways in the Central African Republic. A line from Cameroon