 Route 20 was also shifted southward near Windsor Locks around the same time to make way for an air base, which is now Bradley International Airport.The relocation of Route 15 in 1948 to the new Wilbur Cross Highway (then a four lane surface road) also resulted in an eastward extension of Route 20 to end at the new highway.The Bradley Airport Connector, an expressway connecting the airport to I-91, was constructed and opened to traffic in 1961.