A prototype drone test sprays paint to cover up graffiti in Tacoma earlier this spring. (Courtesy of the Washington State Department of Transportation)
Using aerial drones to spray paint over graffiti along state highways is “very effective,” according to a new report from Washington’s Department of Transportation.
Over the last six months, the agency has tested graffiti removal methods through a pilot program set up by the Legislature last year. Lawmakers set aside $1 million for the department to focus on new ways to erase spray paint from road signs, walls and bridges…