On December 5, 2016, a railway operation trial was witnessed by Director of Railways Facility of Directorate General of Railways Ministry of Transportation Hotma P Simanjuntak, Director General of Metal, Transport Equipment, Electronics I Gusti Putu Surya Wirawan, Head of Bappeda of North Sumatera Province (Sumut) Arsyad Lubis and Simalungun Regent JR Saragih, along with their respective ranks at Sei Mangkei Station. This project is a synergy of BUMN PTPN III, PT KAI & PT Pelindo 1.