fourth-largest phosphate deposits in the world. Their production is 2.1 million tons per year. There are reserves of limestone, marble and salt. Industry provides 20.4% of Togo's national income, as it consists of light industries and builders. Some reserves of limestone allows Togo to produce cement. Transport Road Togo has a road network of as of 2000, with no updated data as of 2023. It has only two major highways, Highway N1 and N2, connecting the capital, Lomé with the city of Dapaong, where it gets diverged northwards to Burkina Faso and from there north-west to Mali, and north-east to Niger. N1 is the longest highway of Togo, at a length of . N2 connects Lomé with Aneho. The extension of N2 is Highway RNIE1, or the Trans–West African Coastal Highway, from Aneho to Cotonou in Benin. Other roads and highways are local and regional roads in the rest of the country, also passing through borders with the neighbouring countries. The Trans–West African Coastal Highway crosses Togo, connecting it to Benin and Nigeria to the east, and Ghana and Ivory Coast to the west. Once the construction in Liberia and Sierra Leone part gets completed, the highway will continue west to seven other Economic Community of West African States (ECOWAS) nations. Railways Togo has a railway network of as of 2008, with no further updates in the network as of 2023. It follows a track gauge of 1,000 mm (3 ft 3+3⁄8 in) (narrow gauge) Trains are operated by (SNCT), which was established as a result of the restructuring and renaming of from 1997 to 1998. Between Hahotoé and the port of Kpémé, the (CTMB) operated phosphate trains. The following are the railway networks present in the country: Lomé–Aného railway Lomé–Blitta railway Lomé–Kpalimé railway Hahotoé–Kpémé railway (operated by CTMB) Air Togo has a total of eight airports, as of 2012, out of which two are international airports and six are domestic airports. The only major airport of the country is Lomé–Tokoin International Airport serving the capital, Lomé, and another Niamtougou International Airport in Niamtougou, serving the country's northern part. Water Togo, in terms of water transport, is only navigable, mostly seasonally on the Mono River, depending on rainfall, as of 2011. Togo has only one large container port for carrying trade operations in and out of the country, the Port of Lomé, in the capital. Demographics The November 2010 census