from_stop_id,to_stop_id,transfer_type,min_transfer_time
113_01,113_01,,
113_02,113_02,,
121_01,121_03,,
121_02,121_03,,
121_03,121_01,,
121_03,121_02,,
135_01,135_01,,
135_02,135_01,2,30
135_02,135_02,,
136_01,136_02,,
168_01,168_01,,
168_01,168_02,,
