March 2024 Contract 3-4 Lam Takhong–Sikhio Section and Kut Chik–Khok Kruat Section
Progress as of 25 March 2024: 74.63%
The Cooperation between the Government of the Kingdom of Thailand and the Government of the People's Republic of China on Bangkok–Nong Khai HSR Development for Regional Connectivity (Section 1: Bangkok–Nakhon Ratchasima)