sentences:  By May, the intent had expanded to get a transcontinental route built, including to the popular tourist destination to the west, Yellowstone National Park.The automobile was just becoming popular, but there were few good all weather roads, no useful long distance roads, and no government marked routes.The federal government had not built roads in the 19th century, except for the National Road (aka National Pike) from Washington, D.C. to the Mississippi River.