Data model
This dataset describes the levels of air pollution in the underground stations of the Île-de-France network
Airparif data
It was created in collaboration with Airparif:
2024 Assessment Date:
This mapping established by Airparif evaluates the levels of particulate air pollution from each station platform and station of Île-de-France with regard to the reference values recommended by the Agency National Food, Environmental and Food Safety work (ANSES).
It is based on a statistical model based on a advanced machine learning developed by Airparif, using measurements carried out over long periods by the operators (RATP and SNCF) at the use of reference devices in 44 station platforms and stations. This model takes into account 19 factors influencing air pollution in these Spaces.
Apart from the frequency of traffic and the configuration of the station or station (volume, length of tunnels on either side, depth of the station, number of transfers and number of entries/exits, etc.), one of the important findings of the study carried out by Airparif is that the type of rolling stock, and in particular braking, has a great influence on the air pollution levels. Ventilation and the presence of doors bearings are also notable influencing parameters.
Underground railway enclosures are characterized by lower concentrations of gaseous pollutants and concentrations of particles often higher than those present in ambient air. Those particles are generated by the wear of braking systems, friction wheels on the rails and the resuspension of particles at each passing trains, accumulating all the more as the environment is closed.