what is the longest highway in the united states
U.S. Route 20 U.S. Route 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 3,365 miles (5,415 km), it is the longest road in the United States,[2] and the route roughly parallels that of Interstate 90 (I-90). There is a discontinuity in the official designation of US 20 through Yellowstone National Park, with unnumbered roads used to traverse the park.
Lincoln Highway Most of U.S. Route 30 from Philadelphia to western Wyoming, portions of Interstate 80 in the western United States, most of U.S. Route 50 in Nevada and California, and most of old decommissioned U.S. Route 40 in California are alignments of the Lincoln Highway. The final (1928â€“1930) alignment of the Lincoln Highway corresponds roughly to the following roads: