New York State Route 9D

New York State Route 9D marker
New York State Route 9D
Map
Map of the Hudson Valley with NY 9D highlighted in red
Route information
Auxiliary route of US 9
Maintained by NYSDOT and the city of Beacon
Length25.21 mi[1] (40.57 km)
Existed1935[2]–present
Major junctions
South end US 6 / US 202 in Cortlandt
Major intersections
North end US 9 / CR 77 in Wappingers Falls
Location
CountryUnited States
StateNew York
CountiesWestchester, Putnam, Dutchess
Highway system
NY 9B US 9E

New York State Route 9D (NY 9D) is a north–south state highway in the Hudson Valley region of New York in the United States. It starts at the eastern end of the Bear Mountain Bridge at an intersection with U.S. Route 6 (US 6) and US 202 in Westchester County, and follows the eastern shore of the Hudson River for 25.21 miles (40.57 km) to a junction with US 9 north of the village of Wappingers Falls in Dutchess County. While US 9 follows a more inland routing between the bridge and Wappingers Falls, the riverside course of NY 9D takes the route through the village of Cold Spring and the city of Beacon.

The route was acquired by the state of New York in pieces over the course of the early 20th century. The part north of Beacon was entirely state-maintained by the end of the 1910s, while delays in rebuilding the remainder of the highway to state highway standards kept New York from fully acquiring the road until the early 1930s. NY 9D was assigned as part of the 1930 renumbering of state highways in New York, extending only from Beacon to Wappingers Falls. It was extended south to the Bear Mountain Bridge by the following year.

  1. ^ Cite error: The named reference 2008tvr was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference 1930map was invoked but never defined (see the help page).