MAPPING OF SPATIAL VARIATIONS OF DIFFERENT VEHICULAR EMISSIONS IN URBAN ROADS – A CASE STUDY

This paper aims at a systematic estimation through GIS based on-road vehicular emission inventory for the vehicular emissions that disturb the ambient air quality standards. The selected geographic area of study is HYDERABAD – with 6,809,970 population (according to 2014 census) and with a vehicular population of around 3.4 million. For Hyderabad, a geographic information system (GIS)-based methodology for emission inventory of on-road vehicles has been developed. The pollutants include: Hydro Carbons (HC); Carbon dioxide (CO2) and Carbon monoxide (CO). Traffic Volume count was done at nine road intersections of varying land-use patterns to assess traffic count. Suitable net emission factor for each vehicle category is selected. Using Vehicular Kilometer Travelled (VKT), emissions are estimated and pollutants are spatially distributed in GIS platform. The inventory information can be used for future planning to reduce emissions.