west of the village of linglestown, linglestown road intersects colonial road, and then continues east to linglestown, where it intersects north mountain road at a roundabout. outside of the village, the amount of development along the highway declines as the route passes through areas of forests and open fields. continuing east, the road becomes more developed as it approaches an interchange with interstate 81 at exit 77. just east of the interchange, pa 39 intersects jonestown road and changes names from linglestown road to hershey road.