 The former alignment of NY 37 from the bypass eastward along the Grasse River to Town Line Road was designated as NY 131 by 1960.The remainder of NY 37's old routing through Massena became an extension of NY 37B, which continued west through the town of Louisville on Town Line Road and an unnamed roadway along the St. Lawrence River to NY 37 at Louisville Corner.The alignments of NY 37B and NY 131 west of the Town Line Road / Maple Street intersection were flipped , placing NY 37B on NY 37's former alignment and NY 131 on the riverside highway and Town Line Road.