The Impacts of Bus Priority Signs on Energy and Emissions

Urban areas often face traffic congestion during rush hour. To solve this situation, the Tainan City Government in Taiwan introduced a bus priority signal system to reduce bus travel time and improve bus services. This study aims to analyze the energy saving and CO2 reduction effects of the real-time traffic signal control system. The results of this study found that bus energy efficiency improved with a maximum reduction of 32.9% in energy consumption, and carbon emissions were reduced by approximately 42,940 kg per year.