 Meanwhile, an alternate route of NY 6 on the east side of the Hudson River between NY 5 (now US 20) in East Greenbush and NY 6 in Waterford was designated as NY 6B by 1926.In the original plans for the U.S. Highway System, the north–south highway along the western bank of the Hudson River was designated as US 9 while the highway on the eastern bank was assigned US 109.The two routes were concurrent from Albany to Mechanicville, where US 9 went west to follow NY 6 while US 109 continued north on NY 30.