KTM West Coast railway line

The KTM West Coast railway line is a main railway line in Malaysia. It runs from Padang Besar close to the Malaysia–Thailand border in Perlis (where it connects with the State Railway of Thailand) to the Woodlands Train Checkpoint in Singapore. Running near parallel to the West Coast and serving the West Coast states of Peninsular Malaysia. The line is owned and used entirely by Keretapi Tanah Melayu (KTM). Past Padang Besar, the line continues on to become the Thai Southern Line, which continues up towards Hat Yai and Bangkok.

The 1,151-kilometre line is busier than its east coast counterpart, the East Coast railway line since it is double tracked and electrified for most of its route and has more services. The line handles a variety of passenger train services such as KTM ETS services, KTM Intercity services, State Railway of Thailand International Express services, KTM Komuter services within the Klang Valley and the George Town Conurbation, and freight trains. Of this total length, more than 759 km is double-tracked and electrified, with the entire line except the Singapore section to be fully double-tracked and electrified by end 2025.

Major stations on the line include KL Sentral in Kuala Lumpur, Butterworth in Penang, Johor Bahru Sentral in the south in Johor and Woodlands Train Checkpoint in Singapore.