 While most of NY 20SY was concurrent with at least one other state highway, there were two segments where NY 20SY followed an independent routing.One was in the town of Camillus, where NY 20SY followed a previously unnumbered highway between NY 321 and NY 5; the other was southwest of the village of Fayetteville, where NY 20SY used a previously unnumbered highway to bypass the village while NY 92 passed through it.When NY 20SY was first assigned, it entered downtown Syracuse on NY 5 and followed NY 5 and US 11 through downtown before leaving the area on NY 92.