Why is Hampton Roads (?) shaded? That diagonal line out in Suffolk shows the border of something?

This map was drawn during the eclipse.

Most of Hampton Roads is shaded grey because technically the region is made up of cities, whereas counties use the off-white color. You will notice that the city of Franklin is also grey.

Independent cities, bro.

https://en.wikipedia.org/wiki/Independent_city_(United_States)

They also have towns shaded as well. That diagonal line is the entire border of the City of Suffolk.

It's Google's new traffic indicator specifically for our region. Instead of highlighting specific roads, they just went with everywhere.

If you are talking about the green area, it's the Great Dismal Swamp, a wildlife refuge.

https://www.fws.gov/refuge/great_dismal_swamp/

If not, what others said about cities and counties is correct.

The shading of metropolitan urban area's on maps goes way, way back to before Google maps. You could have picked up a Virginia road map at the Esso station in 1965, while the attendant cheerfully cleaned your windshield. I'll just assume all the other posters so far knew that, and are just messing around. :-)