Complex sentence: Mammoth Cave Parkway is marked by Kentucky Route 255 from US Route 31W, through the I-65 exit 48 interchange, to the junction with Kentucky Route 70 near the Barren-Edmonson County line within the Mammoth Cave National Park.
Split into simpler sentences: Mammoth Cave Parkway is marked by Kentucky Route 255 from US Route 31W, through the I-65 exit 48 interchange. The road continues northward to the junction with Kentucky Route 70 near the Barren-Edmonson County line within the Mammoth Cave National Park.