trip_id,start_time,end_time,headway_secs
82231,06:02:00,18:02:00,1800
82231,18:32:00,22:32:00,3600
82233,06:07:00,18:07:00,1800
82233,18:37:00,22:37:00,3600
82235,06:43:00,18:13:00,1800
82235,18:43:00,22:43:00,3600
82237,06:45:00,18:15:00,1800
82237,18:45:00,22:45:00,3600