 US 140's interchange with modern US 15 was completed when the then–two-lane US 15 bypass opened in June 1963, immediately before the centennial of the Battle of Gettysburg.In 1977, plans were made for US 140 to be decommissioned, with PA 97 to replace the section in Pennsylvania.This proposal was made in order to eliminate short routes from the United States Numbered Highways system.