What’s the USA’s longest road?
Spanning a whopping 5,415 kilometres (3,365 miles), the US Route 20 is the longest road in America. The US 20 runs east to west from Boston, Massachusetts, at Kenmore Square, right through to Newport, Oregon, where it merges at an intersection with US Route 101 just a mile from the Pacific Ocean. Interestingly, the route passes by the famous Yellowstone National Park and, up until 1940, this is where the road terminated.
Answered by HIW.