Eight months later, on September 20, 1956, it was announced that the Newark Bay Extension of the Turnpike was going to open a week from that day, and that the extension to Hoboken had ballooned to a cost of $18 million (1956 USD) for the first . This project would also tie in with the construction of a new interchange between the Turnpike and U.S. Route 1 in the general area of current-day New Jersey Route 81 in Elizabeth. A year after the project was announced, the State Highway Department decided that the route should become part of the Interstate highway system along with New Jersey Route 58 (the Essex Freeway) would receive funding to help the commercial areas of northeastern New Jersey. Using Federal Aid Improvement Route 105, which had been originally conceived for New Jersey Route 3, the Federal Highway Administration supported funding for Route 58 (which eventually became Interstate 280 upon completion), but did not support funding the Hoboken Freeway.