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.
Interstate 81 in Virginia
Interstate 81 (I-81) is an highway. In the U.S. state of Virginia, I-81 runs for , making the portion in Virginia longer than any other state's portion. It is also the longest Interstate highway within the borders of Virginia. It stretches from the Tennessee state line near Bristol to the West Virginia state line near Winchester.