 The former alignment of PA 124 in Lancaster County became an extended PA 324 between the river and the intersection of Marticville Road and Penn Grant Road and between New Danville and Lancaster, a northern extension of PA 922 along New Danville Pike to the south of New Danville, and unnumbered along Penn Grant Road.The entire length of PA 124 was paved in the 1930s except for a short stretch to the south of Woodbine, with a section of road to the east of York widened into a multilane highway.The unpaved section of the route south of Woodbine was paved in the 1940s.