DAR ES SALAAM // The traffic congestion in East Africa's largest city is showing no signs of abating despite a number of proposed solutions. The projects implemented so far have failed to garner the expected results, according to The Citizen newspaper of Tanzania. The situation is allegedly affecting the economy in Tanzania with losses estimated to top Sh1.4 trillion (Dh3.7 billion) annually, about a sixth of the government budget. Experts list several contributing factors to the problem in the "Haven of Peace", Tanzania's commercial hub and centre of government business. They include: poor city planning; the increasing number of vehicles; the concentration of commercial and government services; and the poor conditions of feeder roads. A survey conducted by the Confederation of Tanzania Industries noted that traffic jams are taking as much as 20 per cent of annual profits of most businesses.