in the early 1970s, the portion of pa 39 in susquehanna township from north sixth street to laurelwood drive was converted from a two-lane roadway to a four-lane divided highway as part of the construction of the us 22 and us 322 bypass. the divided highway was extended west to north front street in the early 1990s. to the southeast, the segment of pa 39 south of west chocolate avenue near hummelstown was rebuilt as a divided highway ca. 1990. all of hersheypark drive east to laudermilch road was converted into a divided highway by 1995. the piece of pa 39 near i-81 was reconstructed into a four-line divided roadway ca. 1990.