Public health officials have spent weeks telling Americans to stay at home.

Are Arizonans listening?

New data offer a glimpse of how traffic has thinned in Arizona amid the coronavirus pandemic and increasingly tough public health precautions to stop the disease.

Google has released calculations based on its users showing a sharp decline in activity around many of the places people typically spend time every day.

Activity around shopping centers, restaurants, cafes and movie theaters declined 40% in Arizona by March 29 when compared to the period from January 3 through February 6.

Activity declined 33% around workplaces, 41% around transit centers like bus and rail stops, and 17% at grocery stores and pharmacies when compared to the same period.

While Gov. Doug Ducey's stay-at-home order did not take effect until the evening of March 31, daily life had already changed for many Arizonans as businesses shuttered or encouraged employees to work from home. Schools closed, too, and spring training was canceled.

The effects have manifested in a number of ways, including mounting unemployment claims.

Meanwhile, activity around people's homes increased 10% in Arizona, according to Google's calculations, and only declined 7% around recreational areas from national parks to dog parks.

Google said it relied on data from users who have turned on a particular setting that tracks location history. And the company said no individuals' movements are made available at any point. Still, the numbers showed just how much the company knows about some of its users day-to-day comings and goings.

There are other signs of the pandemic's impact on the way Arizonans move about their cities.

Data from the analytics company INRIX show traffic thinning on major roads around Maricopa County.

Average daily weekday traffic on major roads during the week of March 23 was 67% of what it was the first week of the month, the company found.

According to the Maricopa Association of Governments, nitrogen dioxide emissions as measured by satellite declined 10.5% in March around the Phoenix metropolitan area, when compared to last March.

Contact Andrew Oxford at andrew.oxford@arizonarepublic.com or on Twitter at @andrewboxford.