The high-speed train of Taichung station and the Taichung international airport are the important transport center in Taichung County. The air quality control is very important based on the numerous passengers. The results of this project could be applied to control and improve the indoor air quality. The examination results showed that the bacteria and fungi indexes of the high-speed train of aichung station during the non-weekend were over the suggested value. The concentrations of TVOC, PM2.5 and PM10 were increased with the numerous passengers during the weekend. The single room model and multi-room model were used to simulate the indoor air quality based on the CO2 value. The results showed that the single room model was more suitable for modeling the indoor air quality than multi-room model. The single room model can perform very well for the relationship between passengers, fresh air change efficiency and indoor air quality. The model shows that increasing the fresh air change rate could efficiently decrease the concentration of carbon dioxide. However, the needed time for decreasing CO2 concentration to the suggested value was depends on the concentration of carbon dioxide. To establish auto carbon dioxide meter in these two stations was suggested when the concentration of CO2 is over the suggested value. The auto air control system could be started until the indoor air quality was at suggested value.

transportation 、site、indoor air、simulated emergency