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 the northern half of 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 Township, New Jersey, clockwise to the
New England Thruway (
I-95) in
Rye, New York, for . 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
U.S. Route 202 (US 202). The northernmost part of I-287 in New Jersey passes through mountainous surroundings. After crossing into New York at
Suffern, I-287 turns east on the
New York State Thruway (
I-87) and runs though 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.