All tunnel excavation on Jakarta MRT Phase 2A is complete, Adhi Karya says
Six tunnel boring machines finished three underground sections, with the deepest rail tunnel in Indonesia now complete and operations targeted for late 2027 and 2029.
Constructor Adhi Karya says the Shimizu-Adhi Joint Venture has finished all tunnel excavation for Jakarta MRT Phase 2A, marked by the breakthrough of tunnel boring machine TBM-2 at the South Shaft of Mangga Besar station on 4 November at a depth of roughly 28 to 30 meters — the deepest railway tunnel in Indonesia. Six TBMs completed three contract packages: Harmoni to Mangga Besar under CP202, along with the HI-Harmoni and Mangga Besar-Kota segments, with the northbound tunnel finished in July 2026.
Physical progress stood at 61.8 percent as of 25 June 2026. Operator targets call for staged operations on the Bundaran HI-Monas segment by the end of 2027 and the full line to Kota by the end of 2029. With civil works on the tunnels complete, the project shifts toward station finishing, systems installation and commissioning for the seven new underground stations.