Traffic congestions is a crucial problem affecting
cities around the globe and they are only getting worse as the
number of vehicles tends to increase significantly. Traffic signal
controllers are considered as the most important mechanism to
control traffic, specifically at intersections, the field of Machine
Learning introduces advanced techniques which can be applied
to provide more flexibility and adaptiveness to traffic control
techniques. Efficient traffic controllers can be designed using a
reinforcement learning (RL) approach but major problems of
following RL approach are, exponential growth in the state and
action spaces and the need for coordination. We use real traffic
data of 65 intersection of the city of Ottawa to build our
simulations and show that, clustering the network using
hierarchal techniques has a great potential in reducing the stateaction
pair significantly and enhance overall traffic
performance.