Complex sentence: The line is completely at grade (ground-level) and uses third rail current collection and, at present, is used by an average of 75,400 passengers daily and operates 20 hours a day, 7 days a week at 8 to 30 minute intervals.
Split into simpler sentences: The line is completely at grade (ground-level) and uses third rail current collection. It operates 20 hours a day, 7 days a week at 8 to 30 minute intervals.