U.S. Route 20
U.S. Highway 20 (US 20) is an east–west United States highway that stretches from the Pacific Northwest all the way to New England. The "0" in its route number indicates that US 20 is a coast-to-coast route. Spanning , it is the longest road in the United States, and particularly from Newport, Oregon to Boston, Massachusetts, the route is roughly parallel to that of the newer Interstate 90 (I-90), which is in turn the longest Interstate Highway in the U.S. There is a discontinuity in the official designation of US 20 through Yellowstone National Park, with unnumbered roads used to traverse the park.
U.S. Route 1
U.S. Route 1 (US 1) is a major north–south U.S. Highway that serves the East Coast of the United States. It runs , from Key West, Florida north to Fort Kent, Maine, at the Canada–US border, making it the longest north–south road in the United States. US 1 is generally paralleled by I-95, though the former is significantly farther west (inland) between Jacksonville, Florida, and Petersburg, Virginia. The highway connects most of the major cities of the East Coast—including Miami, Jacksonville, Richmond, Washington, D.C., Baltimore, Philadelphia, New York City, Boston and Portland, passing from the Southeastern United States to New England.