AIR POLLUTANT MODELING AT HIGHWAY SITES OF RESTRICTED TOPOGRAPHY

This paper describes the application of the UK Department of Transport 's air pollution prediction programme, PREDCO, to four urban street lo cations within the London area, each of which demonstrates restricted dispersion, characteristics. The development of approaches to predict CO levels at varying heights above the road surface are described. Pre dictive expressions are also derived to estimate the concentration of total hydrocarbons and nitrogen oxides, using the emission rates of ea ch pollutant relative to that of CO.