 The Northway was built in segments , which became I @-@ 87 as they were completed and linked to the pre @-@ existing route . Construction began in the late 1950s on the portion of the Northway between the Thruway and NY 7 near Latham . This segment was open to traffic by 1960 , by which time work had begun on two additional segments from Latham to Malta ( at NY 67 ) and from US 9 in northern Saratoga County to US 9 and NY 149 midway between Glens Falls and Lake George village . The expressway was completed between Latham and Clifton Park ( NY 146 ) and from US 9 south of Glens Falls to the Hudson River c . 1961 . The US 9 – NY 149 section of the highway was finished on May 26 , 1961 , at a total cost of $ 9 @.@ 5 million ( equivalent to $ 75 @.@ 2 million in 2016 ) . Work on the Latham – Malta segment concluded on November 22 on that year with the opening of a $ 6 @.@ 6 million piece ( equivalent to $ 52 @.@ 3 million in 2016 ) between NY 146 and NY 67 . When the Latham – Malta segment was opened , it featured one of the few railroad grade crossings on an Interstate Highway , just south of the Thaddeus Kosciusko Bridge over the Hudson . This at @-@ grade crossing was removed within a couple of years when the railroad line was cut backwards and the crossing was no longer needed . Construction on the portion of highway between the two segments began c . 1962 . The 1 @.@ 8 @-@ mile ( 2 @.@ 9 km ) part between NY 9P and NY 50 near Saratoga Springs was finished on July 19 , 1963 , and the entire NY 67 – US 9 segment was completed by 1964 . An extension linking NY 149 to NY 9N south of Lake George village opened in mid @-@ 1963 . 
