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.
Historic roads and trails
In the American Old West, the Oregon Trail was a 19th-century pioneer route from Illinois to Oregon. The Santa Fe Trail was a major commercial and military artery from Missouri to Santa Fe, New Mexico.
In modern times, the Lincoln Highway (dedicated 1913) was the first road for the automobile across the United States of America, spanning 3389 miles coast-to-coast from New York City to San Francisco.