High Quality Content by WIKIPEDIA articles! Interstate 84 (I-84) is a part of the Interstate Highway System that runs from Dunmore, Pennsylvania, to Sturbridge, Massachusetts, in the Eastern United States. In New York, I-84 extends 72.39 miles (116.50 km) from the Pennsylvania state line at Port Jervis to the Connecticut state line east of Brewster. As it heads east–west across the central Hudson Valley, it goes over two mountain ranges and crosses the Hudson River at the Newburgh–Beacon Bridge.