What is the longest highway in the U.S.?
U.S. Route 20 in Massachusetts
U.S. Route 20 is the longest numbered highway in the entire country and also holds the distinction of being the longest numbered highway in the state, edging out Route 28 by merely a mile (Route 28 is long).
Hillclimbing in the United States
The hill climb with the longest road, that has been continuously run, in the world is the Mount Equinox Hill Climb located in Arlington, Vermont just outside Manchester. The length of the road is 5.2 miles and the elevation change is 3,100 feet. It contains more than 40 turns and cars have been clocked at breaking 100 MPH on the long straight ending at "The Saddle". The hill climb has been run by such famous drivers as Carroll Shelby, Briggs Cunningham, René Dreyfus, John Fitch and Miles Collier to name just a few. Started in 1950 as an official SCCA event, it continues uninterrupted, as a vintage car race. Since 1973 the sanctioning body has been the Vintage Sports Car Club of America.