New York State Route 100A
Overview
New York State Route 100
New York State Route 100 is a major north–south state highway in Westchester County, New York, in the United States. It begins parallel to Interstate 87 at a junction with the Cross County Parkway in the city of Yonkers and runs through most of the length of the county via the city of...
in the town of Greenburgh
Greenburgh, New York
Greenburgh is a town in the western part of Westchester County, New York, United States. The population was 88,400 at the 2010 census. Paul J. Feiner has been the Town Supervisor since 1991.-History:...
(in Westchester County
Westchester County, New York
Westchester County is a county located in the U.S. state of New York. Westchester covers an area of and has a population of 949,113 according to the 2010 Census, residing in 45 municipalities...
). It starts in the hamlet of Hartsdale
Hartsdale, New York
Hartsdale is a hamlet and a census-designated place located in the town of Greenburgh, Westchester County, New York. The population was 5,293 at the 2010 census.-Geography:Hartsdale is located at ....
and ends in the community of Grasslands at the boundary between the towns Greenburgh
Greenburgh, New York
Greenburgh is a town in the western part of Westchester County, New York, United States. The population was 88,400 at the 2010 census. Paul J. Feiner has been the Town Supervisor since 1991.-History:...
and Mount Pleasant
Mount Pleasant, New York
Mount Pleasant is a town in Westchester County, New York, in the United States. As of the 2010 census, the town population was 43,724.-Geography:...
.
NY 100A splits from NY 100 along West Hartsdale Avenue, passing by several country clubs as it heads north. It crosses NY 100B 1.5 miles (2.4 km) from its southern end, where the road changes name to Knollwood Road.
