High Quality Content by WIKIPEDIA articles! The Major Deegan Expressway (officially the Major William Francis Deegan Expressway) is a north south expressway in the New York City borough of The Bronx. It is the southernmost 8.38 miles (13.49 km) of Interstate 87, beginning at I-278 at the interchange of the Bruckner Expressway and the Robert F. Kennedy Bridge in the south Bronx and ending at the Westchester County line at Yonkers, where the New York State Thruway begins. In between, the Major Deegan Expressway intersects with I-95 (the Cross Bronx Expressway) near the George Washington Bridge.