Keretapi Tanah Melayu

The core layout of the KTMB network was directly shaped by British colonial economic priorities of the late 19th and early 20th century, focused on moving high-value tin and later rubber from inland plantations and mines to coastal trade ports. This origin explains the disproportionate level of development of the West Coast Line, which runs along the historically wealthier, more resource-dense western side of Peninsular Malaysia, compared to the less dense, later-built East Coast Line.

As one of Southeast Asia's oldest continuously operating rail systems, KTMB has served as a critical fixed land transport link across the Malay Peninsula for more than a century, long predating most regional intercity highway infrastructure. It maintains an active operational connection to the State Railway of Thailand at the northern Padang Besar border crossing, and previously ran services all the way to Singapore's Woodlands rail station before the end of that cross-border segment, supporting long-standing cross-border passenger and freight movement.

Recent decades of public investment have focused on upgrading core high-traffic sections of the network to double-track, full electrification standards to enable faster high-speed ETS services that cut travel times between major peninsular cities like Kuala Lumpur, Penang and Johor Bahru, while expanding KTM Commuter service frequencies to address worsening road traffic congestion in the rapidly growing Klang Valley metropolitan area.