Question: hva er den lengste hovedveien i usa
Answer: U.S. Route 20; U.S. rute 20 i Nebraska; U.S. Route 20 i Ohio; U.S. Route 20 i Montana; U.S. Route 20 i Iowa; U.S. Route 20 i Massachusetts; U.S. Route 20 i New York; U.S. Route 20 i Oregon; U.S. Route 20 i Idaho; U.S. Route 20 i Indiana; U.S. rute 20 i Pennsylvania; U.S. Route 20 i Illinois