Road transport plays a very important role in movement of both passenger and freight. In Kolkata, for example, exponential vehicular growth and insufficient road infrastructure are major causes of slow traffic movement which creates traffic congestion. Air pollution is another important problem in the city because of vehicular emission being a dominant source of the pollution. Vehicular emission is correlated with traffic speed and traffic speed is primarily controlled by road geometric elements and the growth of vehicles. The major objective of the present study is to determine the impact of road geometric elements and traffic characteristics on vehicular emission in Kolkata. Statistical, GIS and remote sensing techniques are used in the geospatial analysis of the present objective. This study has important lessons for civil engineers, urban planners, and policymakers if air pollution is to be reduced in the city.