Evaluation of the environmental impacts of bus rapid transit system on turbo roundabout

The public transportation system is significant in increasing the efficiency of urban mobility in metropolitan cities, especially when transportation infrastructures are involved. The primary problems related to urban mobility are traffic accidents, traffic congestion, and environmental pollution from vehicles’ exhaust pipes. Several types of interventions can be proposed to curb these issues; they are an application of efficient public transportation systems and the implementation of unconventional road intersections. This research focused on the adverse effects of environmental pollution and traffic safety in Bus Rapid Transit operation in a turbo roundabout. We used simulation software such as VISSIM and VERSIT + micro through EnViVer to analyze these adverse effects. The outputs gotten from EnViVer were compared to COPERT 5 mesoscopic model. The results show that the input and output are well correlated. The results also show a difference in emissions between the presence and absence of bus rapid transit (BRT) in turbo roundabout. This study contributes to the growing area of turbo roundabout research, especially for Bus Rapid Transit. Furthermore, this research will assist trans- portation researchers and urban planners in planning constructive transportation planning when it comes to roundabouts and road intersections