the establishment of an alternate route to u.s. route 20, which bypassed syracuse to the south, began in 1933. local restaurants, hotels and gas stations, along with the syracuse chamber of commerce all demanded a route bearing the "20" number on it. this new route would be designated ny 20n, to be established in 1938. the route extended from the town of marcellus to the village of cazenovia and overlapped ny 174, ny 175, ny 173, and ny 92 upon assignment. all four of the routes that ny 20n originally overlapped were assigned as part of the 1930 renumbering of state highways in new york.