The homes along the route become more scattered as NY 415 reaches the village limits. Outside Painted Post, the highway turns to the west, serving a handful of houses and two commercial buildings located adjacent to exit 43 of the Southern Tier Expressway. The route continues on through the town of Erwin, paralleling the B&H Rail Corporation's main line and the north bank of the Cohocton River as it heads northwestward across gradually less developed areas of Steuben County. NY 415 soon enters the hamlet of Coopers Plains, a small residential community centered around the route's junction with Meads Creek Road, which connects to exit 42 of the Southern Tier Expressway. Past exit 42, the state-maintained Meads Creek Road becomes CR 26. Past Coopers Plains, NY 415 enters the town of Campbell and makes a sharp turn to the north, crossing over the freeway to run along the undeveloped eastern side of the Cohocton River valley.