The southern railway connects Bangkok to Hat Yai, and continues from there to Sungai Kolok.
There is a branch from Ban Thung Phoe Junction to Kirirat Nikhom, and two smaller branches of
the railway run from Thung Song to Trang and Nakhon Si Thammarat, and from Hat Yai
Junction to Malaysia and Singapore.
Two linked railways between Thailand and Malaysia are Sungai Kolok Station and Padang Besar
station to the east and west side of Malaysia, respectively. Freight transport of import/export
goods by the rail is more convenient than by road because goods can directly pass through
between Thailand and Malaysia without changing trains.
Padang Besar station has more service provided than Sungai Kolok Station has, since it is located
near larger Malaysian cities, such as Butterworth (Penang), Ipoh, and Kuala Lumpur. Moreover,
there are transit goods from Padang Besar station directly to Singapore. Rail transport provides
both passenger and freight services but priority is for passenger. At Padang Besar station, all
customs procedures can be done with the support of government officers of the railway and
Customs House of both Thailand and Malaysia.