In recent years, city planners in Brookville have proposed the implementation of a new public transportation system to reduce traffic congestion and promote environmentally friendly commuting options. The proposed system includes expanded bus routes and the introduction of light rail. Supporters argue that this system will lead to a decrease in the number of vehicles on the roads, thereby reducing air pollution and traffic jams. However, some opponents contend that the costs of the initial investment are too high and that public funds should be spent on improving current infrastructure instead.

In your essay, evaluate the argument regarding the proposed public transportation system in Brookville. Discuss the strengths and weaknesses of the supporting reasons for both sides, and articulate your perspective on whether you believe the proposal is justified considering the provided evidence.