- Western Terminus:
- Bowman Avenue (CR 104) in Port Chester
- Eastern Terminus:
- South Main Street (US 1) and North Main Street (US 1) in Port Chester
- 0.89 miles
Westchester Avenue is an east/west route from White Plains to Port Chester. It was originally part of NY 119, but that designation was decommissioned with the construction of the Cross Westchester Expressway (I-287), leaving Westchester Avenue with no less than five numerical designations. CR 112 is the easternmost section in Port Chester. Most of it is a locally maintained section of NY 120A. At South Pearl Street, NY 120A splits off, and Westchester Avenue continues east for a few blocks as CR 112 to US 1.