Abstract
Because cities worldwide have high population concentration, traffic congestion is a key problem that needs to be addressed. As modern technology advances, smart traffic management is able to collect data from the environment and uses a contextual signal assignment to determine the traffic flow at intersections and improve the traffic conditions. In this paper, we propose a green signal time allocation system based on a deep Q-network (DQN) that can maximize the capacity at intersections and assign the green light time according to the traffic conditions. The proposed system also aims to reduce the standard deviation of each lane at an intersection by considering the standard deviation of the waiting time. As a result, selfish green signal allocations can be reduced. Thus, the proposed system can achieve better experimental results in a dynamic environment than those of the green signal phase sequence allocation system.
Highlights
Traffic congestion is worsening in cities around the world as the number of vehicles continues to increase
The proposed traffic signal control (TSC) system sets the time in a fixed signal order by considering the standard deviation of the waiting time and the capacity as parameters
The aim of the proposed TSC system is to set the green signal duration time to maximize the capacity at intersections and minimize the standard deviation of the waiting time between lanes
Summary
Traffic congestion is worsening in cities around the world as the number of vehicles continues to increase. With the passing of time, the problem of traffic congestion has rapidly worsened. There is a need for research on smart traffic signal control (TSC) that directly controls traffic flow. Smart TSC is one of the most effective methods for efficiently reducing traffic congestion at intersections. The current traffic signal is a fixed traffic light that allocates time to a preset cycle. Fixed traffic lights always control the traffic flow with the same time distribution, which has the advantage of simplicity and no complexity. Fixed traffic lights are suitable for regular traffic flows. They are suitable for intersections where there is not much traffic variation between lanes. Traffic delays always occur because the actual traffic flow is unpredictable, and dynamism is bound to occur in various traffic flows
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