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.
Virginia State Route 40
State Route 40 (SR 40) is a primary state highway in the southern part of the U.S. state of Virginia. It runs from State Route 8 at Woolwine east to State Route 10 at Spring Grove, about half the width of Virginia. It is the longest state-numbered (not U.S. or Interstate) route in Virginia.