Interstate 684
Interstate 684 (I-684) is a 28.4 mile-long north-south U.S. interstate highway spur route in the states of New York (27 miles) and Connecticut (1.4 miles, with no exits in the state). The New York state portion of I-684 is located entirely in Westchester and Putnam Counties, in a northern portion of the New York City metropolitan area (although some consider the northernmost reaches of I-684 to be beyond the metropolitan area, many Putnam County residents commute south down I-684 to jobs closer to New York City).
The southern terminus of Interstate 684 is at Interstate 287 in White Plains (with a short spur that connects with the Hutchinson River Parkway) and I-684's northern terminus is at the roadway's junction with Interstate 84 near Brewster in Putnam County. Much of Interstate 684 runs parallel to New York State Highway 22.
Trivia
Interstate 684 is part of the original routing of Interstate 87. The designation was changed in the 1970s. Ed Buroughs and keith Eddings travel it from South Salem to White Plains most workdays. Wave if you see them!