 Following this interchange, the road crosses into South Whitehall Township and heads east between residential areas to the north and farm fields to the south before entering Salisbury Township and heading north of Lehigh Valley Hospital-Cedar Crest.Past the hospital, I-78/PA 309 comes to an interchange with the northern terminus of the southern section of PA 29 at Cedar Crest Boulevard before running between residential areas to the north and office buildings to the south.The freeway enters the city of Allentown and runs through woodland, crossing Little Lehigh Creek before it passes through a small section of Salisbury Township.