What is the longest highway in the U.S.?
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.
Knight's Ferry Bridge
The Knight's Ferry Bridge, spanning the Stanislaus River at Knights Ferry, California, is the longest covered bridge in the United States. It was designated a U.S. National Historic Landmark in 2012.
It was for a long time known as the longest covered bridge west of the Mississippi, and since the 2011 destruction of Old Blenheim Bridge in New York State, which had approximately the same length, is undisputed as the longest in the U.S.