Levels of ultrafine particles in the Taipei Rapid Transit System

Document Type

Journal Article

Publication Date


Subject Area

infrastructure - station, mode - rail


Ultrafine particles, Tunnels, Trains, Taipei (Taiwan), Railroad trains, Rail transit stations, Pollutants, Particles, Emissions, Concentration (Chemistry)


Ultrafine particle number concentrations are measured at five stations and inside trains on four routes in the Taipei Rapid Transit System during October-December 2007. The results indicate that there are no additional emission sources of ultrafine particle on the platforms. Ultrafine particle levels at a ground level station were, however, adversely affected by traffic outside of the station. Moreover, particles can enter the underground stations via the subway tunnels resulting in high levels during weekdays.


Transportation Research Part D Home Page: http://www.sciencedirect.com/science/journal/13619209