Complex sentence: The lines run from the capital to Sihanoukville on the southern coast, and from Phnom Penh to Sisophon (although trains often run only as far as Battambang).
Split into simpler sentences: The lines run from the capital to Sihanoukville on the southern coast. Trains also run from Phnom Penh to Sisophon (although trains often run only as far as Battambang).