The elevated Nhon – Hanoi Railway Station metro line officially came into operation on August 8. This route is 12.5km long, with 8 elevated stations and 4 underground stations; of which, the elevated section (Nhon – Cau Giay) is 8.5km long and the underground section (Cau Giay – Hanoi Railway Station) is 4km long. In May 2023, after 3 adjustments, the total investment of this project increased to about 1.3 billion Euros; the implementation period is from 2009 – 2027.