Roy Stone was an American soldier, civil engineer, and inventor. He served in the American Civil War, distinguishing himself during the Battle of Gettysburg, and took part in the Spanish–American War. He pursued a civil engineering career in a peacetime and became in 1893 the first head of the Office of Road Inquiry, which was the Federal Highway Administration's predecessor.

The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program and the Federal Lands Highway Program. Its role had previously been performed by the Office of Road Inquiry, Office of Public Roads and the Bureau of Public Roads.