Route 159 begins at the
Hartford–
Windsor town line as a continuation of North Main Street. It heads north as Windsor Avenue before meeting
I-91 at Exit 41. In Windsor, it underpasses
I-291, with access to and from the east provided by Deerfield Road. Almost immediately, it meets the eastern end of
Route 218. After passing the east end of
Route 178, Route 159 enters the center of Windsor, passing the town green before intersecting the southern end of
Route 75. It then crosses the
Farmington River, and starts to parallel the west bank of the
Connecticut River, which it will for most of the rest of its length. In
Windsor Locks, it meets I-91 once again at Exit 49, and has a brief overlap with
Route 140. It passes along the eastern side of
Suffield, where it has a brief overlap with
Route 190. It then crosses the
Massachusetts state line into
Agawam, where it passes by
Six Flags New England before entering the center of town. North of the center, Route 159 has an interchange with
Route 57, before continuing north along Main Street to the intersection of
Route 75 and
Route 147 just south of the
Westfield River and the
West Springfield city line. Route 159 in Windsor is also known as the
Kasmir Pulaski Memorial Highway. ==History==