REVIEW OF HIGHWAY POLLUTION MODELLING SOFTWARE

Abstract

The cstimation of highway pollution is always a difficult task because the vchicle cmissions depend on several factors like traffic volume, specd, mode of start, fucl type and composition etc. Bccause of the complexity in cstimating traffic cmissions, some computer modcls wcre devclopcd. Presently emissions factor models such as MOBILE, EMFAC, COPERT and dispersion models such as CALINE 4, Urban Air shed Model are available. Models are also nccessary for forecasting and planning purposes. In this paper an attenpt has been made to discuss the fcatures of these computer models, through their input requirements and output.