 By 1970, PA 252 was realigned to its current northern terminus at PA 23 near Valley Forge along its current alignment, running concurrent with US 202 between Paoli and the southern interchange with the US 202 freeway and replacing the PA 83 designation along Valley Forge Road and Valley Creek Road.Also by this time, the route was widened into a divided highway between Newtown Square and Wyola.By 1980, the US 202 concurrency was removed from PA 252.