New York State Route 127 (NY 127) is a north–south state highway in Westchester County, New York, in the United States. It begins at an intersection with U.S. Route 1 (US 1) in the village of Mamaroneck and ends at an interchange with Interstate 287 (I-287) in the city of White Plains. The route also connects to the Hutchinson River Parkway in the town of Harrison. NY 127 was assigned as part of the 1930 renumbering of state highways in New York; however, parts of the road had been state-maintained since the 1910s. Within White Plains, NY 127 is maintained by Westchester County as County Route 30 (CR 30). The concurrent county route designation is unsigned, as are all county routes in Westchester County. Route description NY 127 begins at an intersection with US 1 (East Boston Post Road) in the village of Mamaroneck. The highway proceeds northeast through Mamaroneck as a two-lane residential street named Keeler Avenue, crossing through the Old Rye Neck neighborhood. The route soon reaches a junction with Harrison Avenue, where it turns north off Keeler, leaving the Old Rye Neck neighborhood and soon the entire village. Now in the town and village of Harrison, NY 127 continues as Harrison Avenue, bending north into downtown Harrison, as a two-lane commercial street. Just after the junction with Halstead Avenue, the route crosses west of the parking lot for the Harrison Metro-North Railroad station and soon over the New Haven Line (Northeast Corridor) tracks. After crossing the railroad, NY 127 enters a residential section of Harrison, crossing north as Harrison Avenue. Soon the route crosses under, but does not interchange with, the New England Thruway (I-95), winding northeast past the Harrison Avenue School and a junction with Union Avenue (unsigned CR 94). The route makes a gradual bend to the north, passing west of the Willow Ridge Country Club near the intersection with North Street. At the intersection, NY 127 drops the Harrison Avenue moniker, gaining the North Street one. The route bends northwest through a residential section of Harrison, reaching a junction with the Hutchinson River Parkway (exit 25). Upon crossing the Hutchinson River Parkway, NY 127 enters the Rosedale section of the city of White Plains. Within White Plains, NY 127 becomes a county-maintained highway, gaining the designation of CR 30 as it passes the Maple Moor Golf Course. Winding up the hills of White Plains,