The North–South Expressway, a expressway along the western part of Peninsular Malaysia, passes through Seberang Perai. In addition, about of the Malayan Railway's West Coast Line also lies within Seberang Perai, with the Butterworth railway station serving as the main railway station within northern Malaysia. Aside from the regular Malayan Railway services, the Butterworth railway station is the southernmost terminus of the State Railway of Thailand's Southern Line and the International Express from Bangkok. Notably, the train station is also one of the main stops of the Eastern and Oriental Express service between Bangkok and Singapore.