trip_id,start_time,end_time,headway_secs,exact_times
regular_downhill,08:10:00,21:50:00,600,0
regular_uphill,08:10:00,21:50:00,600,0
afternoon_downhill,14:40:00,21:50:00,600,0
afternoon_uphill,14:40:00,21:50:00,600,0
