trip_id,start_time,end_time,headway_secs
1901,17:30:00,19:00:00,600
1902,18:00:00,19:30:00,600
1903,18:30:00,20:00:00,600
1904,16:30:00,18:00:00,600
1912,10:00:00,11:30:00,600