Spatial and temporal characteristics of traffic related air pollutants (CO, NO, NO 2 and SO 2 ) in Ijebu-ode, Nigeria were determined using replicate portable gas detectors (Land Duo Multi Gas Monitor) at selected road junctions, motor garages and markets. Mapping of different concentration of air pollutants was carried out using kriging type of interpolation method in GIS environment. Concentration of CO ranges from 4.8 ppm at Erinlu/Molipa Roundabout to 137ppm on Sagamu/Ore Expressway. Concentrations of NO 2 range from 100-662 ppb with overall average value (OAV) of 299.8 ppb, while concentration of nitrogen oxide (NO) ranges between 67-302 ppb and OAV of 166.23 ppb. SO 2 had concentration ranging between 38-245 ppb and an OAV of 139.07 ppb all of which are above standard ambient air quality standards. AQI indicated very unhealthy air quality in most areas which calls for the need to establish and strengthen the health-based standard for air pollutants. Abstrak Karakteristik spasial dan temporal polutan udara terkait lalu lintas (CO, NO, NO 2 dan SO 2 ) di Ijebu-ode, Nigeria ditentukan dengan detektor gas portable replika (Land Duo Multi Gas Monitor) di persimpangan jalan yang dipilih, garasi bermotor dan pasar. Pemetaan berbagai konsentrasi polutan udara dilakukan dengan menggunakan jenis kriging dari metode interpolasi di GIS. Konsentrasi CO berkisar dari 4,8 ppm di bundaran Erinlu