Reward Definitions in Reinforcement Learning for Traffic Light Control

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Abstract

Traffic congestion is a problem of tremendous size that affects many people. Using Reinforcement Learning to find a light control policy can ease traffic congestion and decrease travel time for vehicles. This paper specifically looks at the effect of using different reward functions for training agents. We highlight how the learnabilty of a reward function and its alignment with the final goal of the agent are the most important factors when designing a reward definition. Finally we propose a reward function to use for future