Interstate 684 is a suburban freeway stretching 28 miles north from I-287 at White Plains to I-84 and NY 22 in the town of Southeast. The south end of the route partitions with separate branches to the Cross Westchester Expressway (I-287) and Hutchinson River Parkway. The New York State Department of Transportation (NYSDOT) inventories the connection with I-287 as Route I684 and the link with Hutchinson River Parkway as Route 984J.