Complex sentence: One road runs east through Cupi, down the valley to Fiastra and from there to the eastern coast, and the other that follows the spine of the mountain range to Ussita and from there, to Ascoli Piceno.
Split into simpler sentences: One road runs east through Cupi, down the valley to Fiastra and from there to the eastern coast. The other road follows the spine of the mountain range to Ussita and from there, to Ascoli Piceno.