 After a brief stretch of housing tracts , I @-@ 87 connects to NY 2 and NY 7 at exit 6 , a single @-@ point urban interchange , in a commercialized part of Latham . NY 7 joins I @-@ 87 here , following the freeway for roughly 0 @.@ 8 miles ( 1 @.@ 3 km ) to exit 7 , the west end of a limited @-@ access highway previously known locally as Alternate Route 7 . While NY 7 heads east toward Troy , I @-@ 87 continues north past gradually less commercialized areas as it approaches the northern county line . The businesses ultimately give way to stretches of homes and subdivisions as the highway crosses into Saratoga County by way of the Thaddeus Kosciusko Bridge , called by locals " the twin bridges " , spanning the Mohawk River . The northern portion of the Northway through Colonie and Saratoga County is now a heavily @-@ traveled commuter route as a six @-@ lane freeway . Since the highway 's construction , Saratoga County has become the fastest growing area of the Capital District , and indeed all of upstate New York . 
