National Park Service Report
Even with the re-routings and the new federal highway numbers, the identity of the Lincoln Highway did not die with the Lincoln Highway Association. The image made for the highway was by then too deeply seated. Throughout the 1930s and 1940s, many piecemeal road relocations were considered as improvements to the Lincoln Highway, not as bypasses of the Lincoln Highway. This was the case with the 1931 opening of the magnificent George Westinghouse Bridge east of Pittsburgh, and the 1930 Blair Bridge across the Missouri River, which caused Omaha, Nebraska, to be dropped from the Lincoln Highway. [Source]