E.L. Odekanle^1,, M.A. Adeyeye¹, F.A. Akeredolu¹, J.A. Sonibare¹, I.M. Oloko-Oba², O.E. Abiye³, D.A. Isadare⁴, A.A. Daniyan⁴

One of the major environmental challenges in Nigerian big cities is air pollution. This study examined the influence of meteorological factors on in-cabin and pedestrian exposures to gaseous pollutants in various modes of transportation in Lagos City, South West Nigeria in other to establish their linear relationship. The pollutants were CO, VOCs, while the meteorological factors were wind, temperature and relative humidity. Measurements were made inside four major modes of transportation in the city: cars, buses, Bus Rapid Transit (BRT) and walking for CO and VOC. Measurements were done for each mode twice a day (morning and afternoon) between November 3, 2013 and January 6, 2014 (except on Sundays). The relationship between the meteorological parameters and the pollutants’ concentrations was obtained using multiple linear regression model. The result and analysis revealed that CO and VOCs have negative correlations with temperature in all modes of transportation selected while they have positive correlations with relative humidity. It was also revealed that there is statistically meaningful difference between CO concentrations and temperature.

commuters, air quality, pedestrian, meteorological factors, CO, VOC