June McCarroll (June 30, 1867 – March 30, 1954) is credited by the California Department of Transportation with idea of delineating highways with a painted line to separate lanes of highway traffic, although this claim is disputed by the Federal Highway Administration and the Michigan Department of Transportation as two Michigan men painted centerlines before her. She was born in Lewis County, New York, daughter of Nelson and Adaline (Parsons) Whittlesey.