Together with Duncan Watts and others on the team at the CSSLab at Penn, and in conjunction with the city of Philadelphia, we built a collection of interactive data dashboards that visually summarize human mobility patterns over time and space for a number of cities, starting with Philadelphia, along with highlighting potentially relevant demographic correlates. The dashboards are available at

The dashboards are built in Observable. The data are a proprietary combination of cell phone GPS data, demographic data derived from the American Community Survey, and COVID-19 caseload data from the New York Times.