Technical Details and Credits ( Go to Citychrone SDI)

Enrico Ubaldi (Sony CSL)
Bruno Campanelli (Sapienza University of Rome)
Bernardo Monechi (Sony CSL)
Vittorio Loreto (Sony CSL)


Riccardo Corradi (I-Lab,

Citychrone SDI

Citychrone Safety Distancing Index is an instance of the Citychrone++ platform that lets you explore the impact of non-pharmaceutical interventions on public transportation during the first Covid-19 outbreak. With the Safety Distancing Index(SDI), you can visualize overcrowding and criticalities on buses and metro-lines and assess the effectiveness of schools closures, remote-working and national lockdowns in reducing risky situations. Start by choosing a city on the map.