trip_id,start_time,end_time,headway_secs,exact_times
trip:1,07:00:00,08:00:00,1800
trip:1,17:00:00,18:00:00,300,
trip:2,14:05:00,16:00:00,600,1
trip:3,10:00:00,10:15:00,900,1
trip:4,20:00:00,22:00:00,1800,0
trip:5,23:00:00,25:15:00,3000,1
trip:russian,15:00:00,60:00:00,43200,1
trip:after_midnight,10:30:00,10:30:00,900,1
trip:unexisting,10:30:00,10:55:00,900,1
trip:with_no_stop_times,10:30:00,10:55:00,300,1