The Long Island Expressway designation, despite being commonly applied to I-495 in full, technically refers to the stretch of highway between Nassau and Suffolk counties. The section from the Queens–Midtown Tunnel to Queens Boulevard is known as the Queens–Midtown Expressway, and the section between Queens Boulevard and the Queens-Nassau county line is known as the Horace Harding Expressway. The service roads which run parallel to either side of the expressway in Queens are signed as Borden Avenue and Queens Midtown Expressway and as Horace Harding Expressway and Horace Harding Boulevard; from the Queens–Nassau line to Sills Road, they are designated as the unsigned New York State Route 906A and New York State Route 906B.