The traffic flow data on the maps represents the year 2018 situation.
The traffic flow and the number of heavy duty vehicles (http://en.greenintertraffic.ru/meteo/air-quality-model/hdv/) are used as a input data for emission calculation.
Open Traffic Data from Finland:
https://www.paikkatietoikkuna.fi/
https://julkinen.vayla.fi/webgis-sovellukset/webgis/template.html?config=liikenne
http://lipasto.vtt.fi/aliisa/suoritejakaumat.htm
http://lipasto.vtt.fi/liisa/kunnat.htm
The data from Russia:
GIBDD MVD RF (State Inspectorate for Traffic Safety of the Russian Ministry of Interior)
See full description: http://en.greenintertraffic.ru/greenintertraffic/materials/documents-of-the-project.html