Google Releases COVID-19 Mobility Reports

These Community Mobility Reports aim to provide insights into what has changed in response to policies aimed at combating COVID-19. The reports chart movement trends over time by geography, across different categories of places such as retail and recreation, groceries and pharmacies, parks, transit stations, workplaces, and residential. Search by state then scroll down to see each county in Michigan. It clearly shows a marked reduction in travel for nearly all purposes and land uses.

https://www.google.com/covid19/mobility/