According to PC08, the tunnel closure—connecting District 1 with Thu Duc City—is to facilitate the operation of its newly installed automatic fire suppression system.
Motorists traveling in the area are advised to follow the alternative routes provided to ensure public safety and smooth traffic flow:
From Thu Duc City to District 1: Mai Chi Tho Street → To Huu Street → R12 Road → Ba Son Bridge → Le Duan Street → Nam Ky Khoi Nghia Street → Vo Van Kiet Street.
From District 1 to Thu Duc City: Vo Van Kiet Street → Vo Van Kiet Frontage Road → Vo Van Kiet Street → Ton Duc Thang Street → Ba Son Bridge → R12 Road → To Huu Street → Mai Chi Tho Street.
The automatic fire suppression system project in the Saigon River Tunnel commenced in mid-2021, with an investment of VND95 billion.
The high-pressure water mist system is designed to automatically detect and extinguish fires. It divides the tunnel into smaller detection zones for greater accuracy and reliability, issues real-time alerts, and activates sprinklers according to pre-programmed scenarios—targeting individual or adjacent zones as necessary.
