At the end of 2018, the Ministry of Construction (Hanoi, Vietnam) issued Circular 11/2018/TT-BXD promulgating the National Technical Regulation on underground railway structures - QCVN 08:2018/BXD.
The standard lighting values for underground railway structures are prescribed in Circular 11/2018/TT-BXD as follows:
Location | Illuminated Surface | Illumination, lux |
Station | ||
Middle area and platform | Floor surface | 200 |
Ticketing area | - | 200 |
Area before elevators | - | 100 |
Stair steps | Step surface | 100 |
Hallways between stations | Floor surface | 100 |
Entrances, connecting paths | - | 75 |
Connecting tunnels, branches, dead ends | Rail surface | 20 |
Tunnel sections before and after the platform, 25 m long | Rail surface | 60 |
Tunnel section before the tunnel entrance, length, at: | ||
≤ 5 m | Rail surface | 1000 |
≤ 5 m to ≤ 25 m | - | 750 |
≤ 25 m to ≤ 50 m | - | 500 |
≤ 50 m to ≤ 75 m | - | 300 |
≤ 75 m to ≤ 100 m | - | 150 |
≤ 100 m to ≤ 125 m | - | 60 |
≤ 125 m to ≤ 150 m | - | 20 |
Platform at dead-end tunnels | Platform | 30 |
Refer to fire prevention and protection requirements in Circular 11/2018/TT-BXD, which comes into force in Vietnam from March 15, 2019.
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