Interstate 287 (I-287) is an auxiliary Interstate Highway in the US states of New Jersey and New York. It is a partial beltway around New York City, serving northern New Jersey and the counties of Rockland and Westchester in New York. I-287, which is signed north–south in New Jersey and east–west in New York, follows a roughly horseshoe-shaped route from the New Jersey Turnpike (I-95) in Edison, New Jersey, clockwise to the New England Thruway (I-95) in Rye, New York, for 98.72 miles (158.87 km). Through New Jersey, I-287 runs west from its southern terminus in Edison through suburban areas. In Bridgewater Township, the freeway takes a more northeasterly course, paralleled by US Route 202 (US 202). The northernmost part of I-287 in New Jersey passes through mountainous surroundings. Upon entering New York at Suffern, I-287 turns east on the New York State Thruway (I-87) and runs through Rockland County. After crossing the Hudson River on the Tappan Zee Bridge, I-287 splits from I-87 near Tarrytown and continues east through Westchester County on the Cross Westchester Expressway until it reaches the New England Thruway. Within New Jersey, I-287 is maintained by the New Jersey Department of Transportation (NJDOT), and, within New York, it is maintained by the New York State Thruway Authority (NYSTA).
A bypass around New York City had been planned since the 1950s and would become a part of the Interstate Highway System and receive the I-287 designation. The Cross Westchester Expressway, which was originally designated as Interstate 187 (I-187), opened in 1960 as Interstate 487 (I-487) before becoming part of I-287 a year later. The New York State Thruway portion of I-287, which included a crossing of the Hudson River, opened in 1955. In New Jersey, the proposed I-287 had originally been designated as FAI Corridor 104 and incorporated what was planned as the Middlesex Freeway. The New Jersey section of I-287 between the New Jersey Turnpike in Edison and US 202 in Montville opened in stages between the 1960s and 1973; the remainder was completed by 1994. The aging Tappan Zee Bridge was replaced with a new span which opened in stages between 2017 and 2018.
A proposed tunnel across the Long Island Sound between Rye and Oyster Bay on Long Island would link the eastern terminus of I-287 to New York State Route 25 (NY 25) and NY 135 in Syosset.
- ^ Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved September 5, 2022.