trip_id,start_time,end_time,headway_secs
GL1,05:00:00,24:00:00,900
PL1,05:07:30,24:00:00,900
GF1,00:00:00,24:00:00,900
PF1,00:07:00,24:00:00,900
GV1,00:00:00,24:00:00,900
PV1,00:07:30,24:00:00,900
