Hat Yai Junction Railway There are four railway routes converge, that is under the main rail line to Bangkok. The main South line to Banco Wal-Lok Split rail line to Sadao (connected to the rail of Malaysia), and a separate rail line to Songkhla but Songkhla railway is not currently using. Hat Yai junction railway station has passenger train services by a procession the procession 26 and 28 of the railway authority of Thailand. Two more convoys to Malaya railways company (KTMB) of Malaysia between Hat Yai junction-Central Kuala Lumpur.