"trip_id","start_time","end_time","headway_secs","exact_times"
"520-18317254","05:00:00","22:00:00","270",""
"520-18317254","22:00:00","28:59:00","510",""
"520-18317255","05:00:00","22:00:00","270",""
"520-18317255","22:00:00","28:59:00","510",""
