 This change was undertaken as part of a plan to simplify route numbers across the state.Also in 1961, the western section of PA 45 was decommissioned; the piece of PA 45 between Belsano and Nanty Glo became part of an extension of PA 933 and is currently part of PA 271.In 1962, the route was changed from going into State College via US 322 and then PA 26, to go straight from PA 26 to Boalsburg.