What's the longest highway in America?
U.S. Route 20
U.S. Highway 20 (US20) 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 US20 is a coast-to-coast route. Spanning 3,365 miles (5,415km), it is the longest road in the United States,[1] 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 US20 through Yellowstone National Park, with unnumbered roads used to traverse the park.
List of state roads in New Mexico
State roads in New Mexico, along with the Interstate Highway System, and the United States Numbered Highways, fall under the jurisdiction of the New Mexico Department of Transportation. The U.S. state of New Mexico has 412 state roads, totaling that criss-cross the 33 counties of the state. The longest state road, New Mexico State Road 120 (NM 120), measures long, while the shortest, NM 446, measures long. Most highway numbers are one, two, or three digits long, however there are three highways that have four digit highway numbers. These highways are NM 1113, NM 5001, and NM 6563.