Traffic congestion has been evident in Dar es Salaam and other cities in Africa and, has mainly been contributed by the gap in the level of socio-economic development due to demographic pressure. Through this experience, workers in public and private sectors lose a great deal of their working hours to traffic jam which in turn affects the economy negatively. However, many studies on traffic congestion given in Tanzania focused mostly on poor land use management; poor transportation management and roads ineffectiveness, little is known on alternative economic viable solution. Given the utmost importance of transportation on the gross domestic product (GDP) growth; it is economically useful and of policy importance therefore to determine the consequences of traffic congestion on productivity. The rationale of the study is to persuade governments in Sub Saharan Africa especially those yet to adopt it, to turn on to Bus Rapid Transport system a far reaching public investment as an alternative solution for national interest. The study used meta-analysis approach on the methodology. The findings show that workers mobility towards centre business district (CBD) particularly during the peak hours is affected by traffic congestion, thus affecting labour productivity and consequently the economy. For that reason adoption of Bus Rapid Transport will restore the orderly flow in the transportation system while BRT users will do away with excessive delays; restore working hours and improve workers’ productivity and eventually increase Sub Saharan countries’ gross domestic product.