sentences:  There are nine state highways, eight spur and loop highways, one park highway, six toll roads (five independent), twenty-two farm to market roads, four bannered U.S. routes, two bannered state routes, and one bannered farm to market road.There are four interstate highways located in Harris County.These interstates are I-10, which runs west–east, I-45, which runs south–north, I-69, which also runs south-north, and I-610, which forms a small loop around Downtown Houston.