This study focuses on the importance of sustainable urban transportation, particularly the key role of electric buses in addressing global challenges such as air pollution and climate change. By selecting a metropolitan area with a population of at least 500,000 as a case study, we constructed a mathematical model to assist cities in understanding the ecological impact of transitioning to a fully electric bus fleet. The model takes into account various factors, including reduced exhaust emissions, improved air quality, reduced carbon emissions, and the operating costs and charging infrastructure development costs associated with electric buses. On the financial side, the model also analyzes the economic impact of transitioning from traditional fuel-powered buses to electric buses, considering potential external funding sources such as government subsidies and infrastructure investments to alleviate the citys financial burden. Ultimately, we developed a 10-year road-map to assist city transportation authorities in planning the renewal and expansion of their electric bus fleets. Through this letter, we emphasize the environmental and economic advantages of electric buses and encourage city transportation officials to actively consider electric buses as part of sustainable urban transportation, providing our research findings as a basis for decision-making.
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