N4 road (Senegal) need to be nearly 1000 metres long with 500 metres long access roads through the riverside swamps. An alternative (smaller) route is the N5 via Bignona and Banjul, crossing the Gambia river by ferry at Banjul and rejoining the N4 just south of Kaolack. N4 road (Senegal) The N4 road is the Trans-Gambia Highway extension in Senegal, which is the main connection between the Casamance area in the south and the capital Dakar. The road runs north from Ziguinchor in Casamance to Bignona, crossing the Casamance River. It runs north-east to Bounkiling and then north to traverse the country of
Banjul the mainland at the other side of the river. Banjul takes its name from the Mandé people who gathered specific fibres on the island, which were used in the manufacture of ropes. Bang julo is the Mandinka (Mande) word for rope fibre. The mispronunciation led to the word Banjul. In 1651 Banjul was leased by The Duke of Courland and Semigallia (German: "Herzog von Kurland und Semgallen") from the King of Kombo, as part of the Couronian colonization. On 23 April 1816, the King of Kombo ceded Banjul Island to Alexander Grant, the British commandant. Grant founded Banjul as a