BTS Group Holdings Plc has proposed a plan to invest in the Khon Kaen-Laem Chabang dual-track railway.
It says its investment could save the state budget 70 billion baht.
The plan was unveiled as BTS chairman Keeree Kanjanapas met Transport Minister Prajin Juntong on Friday.
Citing the plan, ACM Prajin said BTS will wholly invest in the construction of the 500-km route, the installation of signal systems and the purchase of locomotives and carriages.