New York State Route 20N (NY 20N) was a state highway in central New York in the United States. It was an alternate route of U.S. Route 20 (US 20) that stretched for 30.5 miles (49.1 km) between Marcellus and Cazenovia. The road began at its parent route, US 20, and NY 174 in Marcellus and ended at US 20, NY 20SY, and NY 92 in Cazenovia. All of NY 20N was concurrent with at least one other route, namely NY 174 in Marcellus, NY 175 from Marcellus to Onondaga Hill, NY 173 from Onondaga Hill to Manlius, and NY 92 and NY 20SY between Manlius and Cazenovia. NY 20N was assigned in May 1937 and removed in 1961 along with NY 20SY.

New York State Route 174 (NY 174) is a state highway in Onondaga County, located in Central New York, in the United States. The highway is 16.7 miles (26.9 km) long and passes through mostly rural regions. Route 174 begins at an intersection with NY 41 in Borodino, a hamlet of Spafford. It heads generally northward for most of its length, except for short distances in the villages of Marcellus and Camillus. The route ends at a junction with NY 5 west of Camillus, at the west end of the Route 5 Camillus bypass. Route 174 is located along a large mapped sedimentary bedrock unit, known as the Marcellus Formation. The formation is named for an outcrop found near the town of Marcellus, New York, during a geological survey in 1839.