Load-Aware Traffic Light Controlling System
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Date
2010-07
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Addis Ababa University
Abstract
The availability and the growing number of automobiles in Ethiopia, especially in Addis Ababa
brought some problems. Some of the problems are happening because of the operating technique
of conventional traffic lights. They work by allocating equal and fixed time for every road that is
regardless of their respective load. Mostly as a result of this, we see traffic conjunctions around
several road junction areas of the city. Hence, we can say the very approaches that are made to
solve the problem, sometimes become cause of the problem.
We have learned that the Addis Ababa City Road Administration has tried to solve the problem,
using the statistical way of time allocation at some areas of the city, but the problem is yet far
from removed. This all implies that another way of solution should be proposed.
This project proposes a Load Aware Traffic Light Controlling System. When each road has a
normal load, the new system basically uses a constant and equal period of time to allow traffic
from one direction. However, this amount of period for a direction would momentarily change if
the system detects high traffic load on that direction. In other words, the system is expected to
detect whether traffic load on a given direction exceeds a certain limit and temporarily allow
traffic on that direction to pass for a longer period of time. Afterward as long as the roads work
under normal load, the system continues working in the first method.
This system will improve efficiency of the traffic controlling systems of our city. Plus using this
new system will minimize the time the automobiles waiting time for the green light, and this
helps to save time and fuel.
Hence, in this project a Load Aware Traffic Light Controlling System simulation and prototype
is developed to improve the conventional traffic lights of our city.
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Keywords
Growing Number, ; of Automobiles in Ethiopia