This study examined the influence of meteorological parameters on vehicular emission concentration. The pollutants were CO and No2, while the meteorological factors were wind speed, temperature, and relative humidity. Their concentrations were monitored in two peak periods (morning and evening) between March to June, 2012. The relationship between the pollutant and meteorological factors were obtained using multiple linear regression model and it showed a high correlation between CO and relative humidity, N02 and the meteorological factors during the morning peak. The result of the evening peak showed a high correlation between No2 and the meteorological factors. The coefficient of determination yielded 1.00, which shows that the total variation of the pollutants can be explained by the meteorological factors. This statistically implies that wind speed, temperature, and relative humidity have a significant impact on vehicular emissions.
