Development and Application of Macroscopic Emission Model

The macroscopic traffic emission model is a useful tool in the wide-area emission assessment,which is typically used to calculate and develop the national or regional emission factors and inventories.China is still in the absence of its own emission model.Using models of other countries may result in substantial errors in the emission estimation.This study is to develop and program a macroscopic emission model for China based on the emission data collected in China,supplemented by some modeling data of other countries.On the basis of a comprehensive review of existing macroscopic emission models,this paper first develops the goals,structure,and modeling method of the macroscopic emission model in traffic environment for China.Then,it provides a detailed analysis on the data collection,data analysis,and calculation process for the key modules of such a model.Subsequently,it implements the model using Visual Basic language.Finally,it estimates the emissions for Beijing in 2008 with the developed model,which are also compared with results from the MOBILE emission model.