The new Kunming-Singapore railway, a massive network of railways that is under-construction. The huge rail network will connect China, Singapore, and the rest of the mainland countries of Southeast Asia.
Note, according to ASEAN Today :
“Plans to build a multi-billion-dollar high-speed railway linking Singapore and Kuala Lumpur have been officially canceled, according to a joint statement from both governments released on January 1, 2021. The two governments were reportedly unable to settle disagreements after Malaysia pushed for structural changes to the project and to fast-track construction by two years.” (https://www.aseantoday.com/2021/01/malaysia-and-singapore-drop-high-speed-rail-plan/)
The 350 km sector of from Kuala Lumpur to Singapore was to be the final section of the Kunming-Singapore railway.
Source: Behind Asia, 8 August 2021 https://www.youtube.com/c/BehindAsia/about
Behind Asia is Philippines-based, and focuses on promoting past, present and future developments around Asia.