- Western Terminus:
- Central Park Avenue (NY 100) in Greenburgh
- Eastern Terminus:
- Bronx Parkway and Ardsley Road (CR 78A) in Greenburgh
- 0.68 miles
Ardsley Road is an east/west route extending from Ardsley to Scarsdale. It exists as a local street from Ardsley to Greenburgh. At Central Park Avenue (NY 100) in Greenburgh, it becomes CR 78. After about half a mile, it descends a small switchback. At the bottom, there is an interchange with the Bronx Parkway, and Ardsley Road changes designation to become CR 78A.