Originally, the city developed on the northern side of the river, but as it grew, bridges were developed to connect the north with the south. The first of these was the Pont des Martyrs (2-lane with two pedestrian sections) and the King Fahd Bridge (four-lane with two motorcycle and two pedestrian sections). Additionally, a seasonal causeway between the eastern neighborhoods of Sotuba and Misabugu was inherited from colonial times (alternated traffic on one lane with five crossing sections). The Sotuba Causeway ( ''Chaussée submersible de Sotuba'' in French, and ''Babilikoroni'' in Bamanankan) is typically under water from July to January. A third bridge (1.4 km long, 24 m wide, four-lane with two motorcycle and two pedestrian sections) is being built at the same location to reduce downtown congestion, notably by trucks.