from_stop_id,to_stop_id,transfer_type,min_transfer_time
2508339,2508339,1,
2508439,2508476,1,
2508476,2508439,1,
2508476,2508476,1,
2508536,2508536,1,
2508545,2508740,1,
2508625,2508625,1,
2508740,2508545,1,
2508765,2508765,1,
2508906,2508906,1,
