New York State Route 40

New York State Route 40 (NY 40) is a north–south state highway in eastern New York in the United States. It is 54.67 miles (87.98 km) long and runs from NY 7 in the city of Troy north to NY 22 in the town of Granville. NY 40 also passes through the villages of Schaghticoke and Argyle and enters the vicinity of the village of Greenwich. It intersects three east–west highways of note: NY 67 just outside Schaghticoke, NY 29 west of Greenwich, and NY 149 in the hamlet of Hartford. Incidentally, NY 40 has overlaps with all three routes.

NY 40 originally extended south to East Greenbush and north to Comstock when it was assigned as part of the 1930 renumbering of state highways in New York. The route was truncated south to NY 149 in Hartford in the early 1940s and north to U.S. Route 4 in North Greenbush in the late 1950s. It was re-extended northward to its current northern terminus in the 1960s, but also truncated northward to its current southern terminus in the early 1970s. In 1980, ownership and maintenance of the portion of NY 40 south of NY 142 and outside of Troy was transferred from the state of New York to Rensselaer County as part of a highway maintenance swap. This section of the route is co-designated and co-signed as County Route 145 (CR 145) and has no reference markers.

NY 40 begins at an intersection with NY 7 (Hoosick Street) just east of the Collar City Bridge in the city of Troy. NY 40 proceeds north along 10th Street for less than a block, turning northeast along Oakwood Avenue, a two-lane mixed commercial and residential street through the Frear Park section of Troy. Passing the campus of St. Mary's Hospital, the route begins to run along the western edges of the namesake park, reaching an entrance at a junction with Frear Park Road. Running along the western edge of Wright Lake, the route turns northward and soon leaves the western extremities of the park. Now back in the North Central section of Troy, NY 40 runs north through Oakwood Cemetery.

Soon crossing into Lansingburgh, NY 40 runs northeast through the eastern end of the cemetery, passing the nearby St. Peter's Cemetery as well. Just after crossing the northern limits of Oakwood Cemetery, the route crosses into the town of Brunswick, where it becomes maintained by Rensselaer County and gains the County Route 145 (CR 145) designation. Continuing north through Brunswick, NY 40 continues through Lansingburgh, which is where the route meets a junction with NY 142. NY 40 and NY 142 become concurrent for one block in front of the Lansingburgh Reservoir, before NY 40 turns northward once again. Now on Leversee Road, the route remains a two-lane residential street, reaching a junction with the terminus of CR 116 (Brickyard Road).

NY 40 crosses into the town of Schaghticoke, where it gains the Speigletown Road moniker. Through the town of Schaghticoke, the route remains the two-lane residential road it was through Lansingburgh, reaching a junction with CR 126 (Fogarty Road). At the junction with CR 126, NY 40 turns northward, drops the moniker of Speigletown Road and changes into a much more rural roadway. Passing some residences as it winds northward, the route meets the junction with CR 122 as it enters the populated hamlet of Grant Hollow. Bypassing the center of Grant Hollow, NY 40 soon reaches the hamlet of Melrose, where it meets with the junction with CR 117 (Melrose–Valley Falls Road).

Continuing north through the town of Schaghticoke, NY 40 returns to its rural settings north of Melrose, turning northeast at the junction with Northline Drive. Along this northeastern stretch, the route passes through the rural hamlet of Schaghticoke Hill and soon crosses the Tomhonnock Creek into the village of Schaghticoke. At the southern end of the village, NY 40 reaches a junction with NY 67 (Old Schaghticoke Road). NY 40 and NY 67 become concurrent and run along the Hoosic River into the village. Known as Main Street through the village, NY 40 and NY 67 become a two-lane commercial street through the village. Just north of downtown, the routes reach a junction with CR 125, where NY 67 turns eastward while NY 40 proceeds north.

NY 40 continues north through the town of Schaghticoke, returning the rural settings through the town. After the junction with Casey Road, the route makes a northerly dash to the county line, where it crosses just north of Molesky Lane. Now in Washington County, NY 40 continues north through the town of Easton. Just after the line, the route enters the hamlet of Crandall Corners, where it junctions with the eastern terminus of CR 54. Turning northeast, the route enters the hamlet of South Easton and soon after, Barkers Grove. Through Barkers Grove, the route passes several local residences and winds north into the hamlet of Easton. NY 40 through Easton is the main thoroughfare, passing multiple residences and a junction with Wells Road and Vly Summit Road.

North of the namesake hamlet, NY 40 continues northeast through the town of Easton, soon turning north through rural sections of Washington County. At the junction with Hegeman Bridge Road, the route turns northwest and reaches a junction with NY 29. NY 29 and NY 40 become concurrent, turning north past the Battenkill Country Club and soon over the Batten Kill. Now in the town of Greenwich and the hamlet of Middle Falls, NY 40 turns northeast and reaches a roundabout, where NY 29 continues east and NY 40 turns north through Greenwich. Continuing north through Greenwich, NY 40 turns northeast at a junction with CR 77 (Bald Mountain Road).