 The route bends to the east, crossing through Nesconset, then to the northeast and enters an at-grade interchange with NY 25 (Middle Country Road).Crossing into the Saint James section of Smithtown, NY 347 continues to the northeast as the four-lane commercial arterial, now known as Nesconset Highway.NY 347 soon leaves Smithtown for Lake Grove, where it expands to six lanes, crossing a short time into Brookhaven before re-entering Lake Grove.