Interstate 87, the Adirondack Northway, is a six-lane north–south freeway along the western edge of Halfmoon. U.S. Route 9 parallels the interstate farther to the east and crosses into the town from Albany County on the Crescent Bridge. New York State Route 146, an east–west highway, intersects US-9 at the hamlet of Clifton Park. U.S. Route 4 is a north–south highway in the eastern part of the town. New York State Route 236 is a short state highway linking NY-146 to US-9.
interstate 87 the adirondack northway is a six-lane north–south freeway along the western edge of halfmoon us route 9 parallels the interstate farther to the east and crosses into the town from albany county on the crescent bridge new york state route 146 an east–west highway intersects us-9 at the hamlet of clifton park us route 4 is a north–south highway in the eastern part of the town new york state route 236 is a short state highway linking ny-146 to us-9