Hello @ROMANISTA [ITA]
As you know, the Duisburg-Calais road is always the most active region. In addition to this, we can list the city density as follows;
Calais (France)
Duisburg (Germany)
Dusseldorf (Germany)
You can follow the maps and user density in real time here; TruckersMP Map
Kind Regards;
Nalet
TruckersMP Veteran Driver.