The availability and the growing number of automobiles in Ethiopia, especially in Addis Ababarnbrought some problems. Some of the problems are happening because of the operating techniquernof conventional traffic lights. They work by allocating equal and fixed time for every road that isrnregardless of their respective load. Mostly as a result of this, we see traffic conjunctions aroundrnseveral road junction areas of the city. Hence, we can say the very approaches that are made tornsolve the problem, sometimes become cause of the problem.rnWe have learned that the Addis Ababa City Road Administration has tried to solve the problem,rnusing the statistical way of time allocation at some areas of the city, but the problem is yet farrnfrom removed. This all implies that another way of solution should be proposed.rnThis project proposes a Load Aware Traffic Light Controlling System. When each road has arnnormal load, the new system basically uses a constant and equal period of time to allow trafficrnfrom one direction. However, this amount of period for a direction would momentarily change ifrnthe system detects high traffic load on that direction. In other words, the system is expected torndetect whether traffic load on a given direction exceeds a certain limit and temporarily allowrntraffic on that direction to pass for a longer period of time. Afterward as long as the roads workrnunder normal load, the system continues working in the first method.rnThis system will improve efficiency of the traffic controlling systems of our city. Plus using thisrnnew system will minimize the time the automobiles waiting time for the green light, and thisrnhelps to save time and fuel.rnHence, in this project a Load Aware Traffic Light Controlling System simulation and prototypernis developed to improve the conventional traffic lights of our city.