NY 45 runs parallel to the small portion of the Garden State Parkway (GSP) that enters New York. Officially this portion is considered an extension of the New York State Thruway. While NY 45 never intersects the GSP, it provides a link to the parkway. South of the New Jersey border in Bergen County, CR 73 intersects the GSP, and in New York, NY 45 intersects CR 41, which intersects the parkway. Through Chestnut Ridge (where it is known as Chestnut Ridge Road, just as CR 73, its southern extension, is in New Jersey), it crosses the New York State Thruway.