Complex sentence: Upon entering Villa Park, CR S18 turns west and widens into a regular surface street and follows Villa Park Road, immediately before its northern terminus of CR S18 when the road also follows the most eastern segment of Katella Avenue before interchanging with State Route 55.
Split into simpler sentences: Upon entering Villa Park, CR S18 turns west and widens into a regular surface street and follows Villa Park Road. Immediately before its northern terminus of CR S18, the road also follows the most eastern segment of Katella Avenue before interchanging with State Route 55.