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ABSTRACT
The escalating environmental and public health concerns associated with vehicular emissions in Benin City, Nigeria, prompted this study to investigate the direct effects of vehicular emissions on air quality parameters in Oredo L.G.A. The aim was to fill the knowledge gap regarding the impact of vehicular emissions on air quality in the region, focusing on selected traffic hotspots along Benin-Sapele road. Methodologically, the study employed a comprehensive approach by characterizing air quality parameters such as CO2, PM, HCHO, and TVOC at specific traffic hotspots, including Winner’s and PZ junctions, and a non-traffic junction, ADP junction. Traffic density at these locations was determined during peak and off-peak periods by observation and traffic count, and the relationship between air quality parameters and traffic density was established using regression analysis. The results of the study revealed a significant correlation between vehicular emissions and air quality parameters in Benin City. For morning peak period , air quality parameter with high R2 value on PM2.5 (R2 = 0.869) and TVOC (R2 = 0.687) which for evening peak period; PM2.5 (R2 = 0.538) and HCHO (R2 =0.853). It is also concluded from the results that the evening peak period has the highest traffic density with Winner’s junction having the most traffic density which mostly comprises of cars having a traffic density of 32.00 ± 13.856V/15mins and buses with traffic density of 7.67 ± 0.577V/15mins. From the air quality data, evening peak has the highest concentration of pollution with PZ junction being the most polluted hotspot having CO2 concentration of 1049.67 ± 54.775ppm. Based on these findings, it is recommended that informed policy decisions and urban planning strategies be implemented to mitigate the impact of vehicular emissions on both the environment and public health in the region.
