U.S. Route 20
U.S. Highway 20 ( in the Anglo- Saxon usage also: U.S. Route 20, U.S. 20 short ) is a West - East American main road. The "0" in the street name indicates here is that there is a coast -to- coast road. With over 5415 kilometers, it is the longest road in the United States of America.
Before the U.S. Highway System was created, the section between New England and New York as New England Interstate Route 5 was (NE -5) respectively.