trip_id,start_time,end_time,headway_secs,exact_times
trip_1,08:00:00,20:00:00,900,0
trip_2,08:00:00,20:00:00,900,0
trip_3,08:00:00,20:04:00,900,0
trip_4,08:00:00,20:04:00,900,0
trip_5,08:00:00,20:02:00,900,0
trip_6,08:00:00,20:02:00,900,0