The fore-runner of Port Authority of New York and New Jersey was established on April 30, 1921. Huge transportation projects opened between the wars: The Holland Tunnel in 1927, The George Washington Bridge in 1931, The Bayonne Bridge in 1931, and The Lincoln Tunnel in 1937, allowing vehicular travel between New Jersey and New York City to bypass the waterfront. Hackensack River crossings, notably the Pulaski Skyway, were also built. Newark Airport was the first major airport in the New York Metropolitan Area, opening on October 1, 1928. At Houvenkopf Mountain crosses were burned by the Ku Klux Klan. Radburn was founded in 1929 as a town for the motor age.