ny 2 begins at i-87 (the adirondack northway) exit 6 in the hamlet of latham, where ny 7 leaves troy–schenectady road to join i-87. the route proceeds east on troy–schenectady road, a four-lane boulevard in the town of colonie. passing south of the latham farms shopping center, and soon north of the latham circle mall, the route enters latham circle, where it connects to us 9 (loudon road). instead of directly intersecting us 9, ny 2 meets a series of ramps leading to and from the road while us 9 itself crosses under the circle, allowing for a continuous flow of traffic on us 9. east of us 9, ny 2 runs southeast through colonie, serving residential neighborhoods and a short commercialized stretch on its way into the riverside city of watervliet, where it becomes 19th street. two blocks into the city, maintenance of the route shifts from the new york state department of transportation (nysdot) to the city highway department.