Traffic emission is the main air pollutant source in urban area. Since the sources are close to the pedestrian and people in commercial districts, the citizen’s exposure risk caused by the traffic air pollution source is concerned. Air quality has become one of important indicators of urban life quality. To evaluate the correlation between traffic air pollutants emission and air quality of Taipei metropolitan area, one need to include two administration districts, namely Taipei City and Taipei County. The extended model is more appropriate to reflect the current situation of transportation system and activities in Taipei metropolitan area than before. The model is validated and calibrated to confirm its assessment applications. Moreover, this model assesses the integrity and the rationality of the Taipei country transportation district and road network constructed by model.
This study includes two models, trip analysis model and traffic emission assessment model. The trip analysis model is to model trips and routes in the metropolitan’s transportation network. The traffic emission assessment model integrates three sub-model by System Dynamics theory, namely the Logit sub-model, traffic flow sub-model and traffic emission sub-model. The models then were used to calculate and to compare the air pollutant emission change before and after the mentioned transportation infrastructures were accomplished.
In the study, the model was confirmed by the processes of validation and calibration with government published data. Evaluation of transportation construction simulation Songshan MRT lines, airport lines, lines, and after the completion of the ring. The number of trips up to the whole motorcycle trips, but there was no detectable change in car trips. The spatial distribution of automotive vehicles and more focused on the major roads, expressways and highways, to relieve the general road traffic. The total emission of NOx , HC, and CO in Taipei metropolitan area is expected to be reduced because of motorcycle are reduced. The total emission of NOx , HC, and CO is reduced in Xinbei City more than in Taipei City.