This article describes the system of transport in Senegal, both public and private.This system comprises roads (both paved and unpaved), rail transport, water transport, and air transportation. Roads The system of roads in Senegal is extensive by West African standards, with paved roads reaching each corner of the country and all major towns. International highways Dakar is the endpoint of three routes in the Trans-African Highway network. These are as follows: Cairo-Dakar Highway which crosses the edge of the Sahara Dakar-Ndjamena Highway which links the countries of the Sahel, also called the Trans-Sahelian Highway Dakar-Lagos Highway running along the West African coast and called by the Economic Community of West African States (ECOWAS) the Trans–West African Coastal Highway (though ECOWAS considers this route to start in Nouakchott, Mauritania). Senegal's road network links closely with those of the Gambia, since the shortest route between south-western districts on the one hand and west-central and north-western districts on the other is through the Gambia. Motorways The only operational motorway in Senegal currently runs for 34 km. between Dakar and Diamniadio, and it is a toll motorway. A new part of the motorway, of 16.5 km. is currently under construction, which will reach the Blaise Diagne International Airport. Another section of 50 km. is also under construction, linking the airport to Thiès; and the 115 km. stretch from Thiès to Touba, the final destination of the planned motorway, will start under construction in the near future. National roads The most important roads in Senegal are prefixed "N" and numbered from 1 to 7: N1: Dakar – Mbour - Fatick - Kaolack – Tambacounda – Kidira – (Mali) N2: Pout – Thiès – Louga - St-Louis – Richard Toll – Ouro Sogui – Kidira - (Mali) N3: Thiès – Diourbel – Touba – Linguère – Ouro Sogui N4: Kaolack – (Trans-Gambia Highway) – Bignona – Ziguinchor – (Guinea-Bissau) N5: Bignona – Diouloulou – (Gambia) - Sokone - Kaolack N6: Tambacounda – Vélingara - Kolda – Ziguinchor – (Guinea-Bissau) N7: Ouro Sogui - Tambacounda – Niokolo-Koba – Kédougou – Guinea Regional roads R20, R21, R22 R30, R31, R32 R60, R61 R70 Major incidents Senegal bus crash (2023) Railways total: 906 km narrow gauge: 906 km of gauge (70 km double track) Maps UN Map Ground transport There were an estimated 4,271 km of paved roads and 10,305 km of unpaved roads as of 1996. Taxis (black-yellow