Traffic flow characteristics and impacts on air quality at urban roundabout junction

Abstract

Rapid urbanization and the unprecedented growth in vehicles have resulted in profound deterioration of air quality in urban centers Traffic junctions of urban centers often attract large number of vehicles creating congested conditions which as a result generate higher carbon monoxide CO emissions Since traffic flow characteristics generally observed at junctions complicate dispersion phenomena understandings on pollutant dispersions in the close vicinity of traffic junctions are importan