 Complete the following phrase:  Prior to the 1940s, the boulevard consisted of two sections separated by Cunningham Park, with only the northern spur officially called Cross Island Boulevard. In late 1932, the city finalized plans to extend Cross Island Boulevard south to Springfield Boulevard and Linden Boulevard in southern Queens. On November 11, 1938, construction began on an upgrade to the north end of the boulevard, in order to serve as a link between the BronxWhitestone Bridge and the 