 It passes through several riverside and canalside communities, including two cities (Troy and Mechanicville) and seven villages.US 4 crosses several major east–west highways as it proceeds north, such as Interstate 90 (I-90) in East Greenbush, New York State Route 7 (NY 7) in Troy, NY 29 in Schuylerville, and NY 149 in Fort Ann.It also overlaps with the north–south NY 22 for from Comstock to Whitehall and with NY 32 for a total of between Waterford and Bemis Heights and from Schuylerville to Northumberland.