The GreenZenTag project involves mounting 10 micro sensors on the roofs of trams which measure and geotag air pollution levels, transmitting the data in real time.

Every day between mid-December and mid-February the sensors will perform 6000 measurements of fine particulate matter (PM2.5 and PM10) on Line A between Fontaine and Échirolles. This data will complement measurements already being taken by Atmo Auvergne-Rhône Alpes, the organisation responsible for monitoring the region’s air quality.

The two-month data collection phase will be followed by two months of analysis. If successful, the system could be permanently integrated into the city’s air pollution monitoring infrastructure and a smartphone app showing pollution levels could also be rolled out.

The monitoring tool has been developed by the Agglomeration of Grenoble Laboratory of Mobility Research (Lemon) with the support of French startups EcoLogicSense and Zenbus as well as Egis Environment Atmo Auvergne-Rhône Alpes.