There are more than 3,500,000 car radios in the Philadelphia area. On March 24, though, many of these devices became quarantined along with their owners. That was the day when the Governor of Pennsylvania shut down the state to slow the spread of COVID-19.
According to the Apple Mobility Index, the Governor's public-safety order caused traffic on Philadelphia roadways to plummet to 40% of pre-pandemic levels.
By the beginning of July, however, the AMI indicates that traffic in Philadelphia began to exceed pre-Covid levels. The surge in mobility is due, in part, to work-from-home, furloughed, and laid-off employees returning to their workplaces.
According to Nielsen, during the week of April 30, only 39% of adults with jobs were working outside-the-home. During the week of October 1, though, that number had expanded to 61%.