from_stop_id,to_stop_id,transfer_type,min_transfer_time
2430903,2430903,1,
2454788,2454788,1,
2454788,2455471,1,
2455471,2454788,1,
2455471,2455471,1,
2506080,2506080,1,
820643,820643,1,
9469,9469,1,
