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.
List of Interstate Highways in New York
There are a combined of Interstate Highways within New York, which handles about 19 percent of vehicle travel in New York. At approximately , I-78 is the shortest main Interstate Highway, while I-90 is the longest, spanning within New York. I-878, located in Queens, is the shortest active route in the Interstate Highway System at .