 The network uses a ballasted setup with locally manufactured concrete sleepers.Since the early 1980s, companies formed via international collaboration, such as Mastrak Sdn Bhd had been producing these sleepers via technology transfer.In the five years period of 1982-1987 alone, it was estimated that about 500,000 pieces of sleepers had been laid for the Kerdau-Jerantut and Sungai Yu-Tumpat lines, giving clear preference due to its advantages over wooden sleepers.