On September 30, 1958, the first section of the Long Island Expressway outside New York City, a segment from the Queens–Nassau line to Willis Avenue in Albertson, officially opened to traffic. The section of the Long Island Expressway west of the Clearview Expressway was designated as I-495 in October 1958. The Long Island Expressway's extension to Guinea Woods Road in Roslyn was officially opened on September 29, 1959, which allowed eastbound traffic to continue onto the eastbound Northern State Parkway by using a short ramp, and vice versa for westbound traffic. By this time, the Long Island Expressway was continuous between Bayside and Roslyn, although the portion of the Long Island Expressway near the Clearview Expressway (I-295) was not yet completed.