The most probable loss scenario for underground traffic facilities (tunnels, railway stations) is an uncontrollable fire.

对于地下交通设施（隧道、地铁站），最有可能的损失情况是失去控制的火灾。

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Metros station is an underground traffic space which is negative to the health of people in physiological and psychologically aspects.

地铁车站是处于地下的交通空间，有很多对人的生理和心理不利的因素。

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Article14 in constructing trunk lines of underground traffic and other underground projects in a city, consideration shall be given to the needs of civil air defense.

第十四条城市的地下交通干线以及其他地下工程的建设，应当兼顾人民防空需要。

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Officials in Morocco say it is time to regulate the trans-Mediterranean traffic rather than leave the underground networks to do their worst.

ECONOMIST: Morocco

The young inventor envisages PaveGen systems being used to power off-grid appliances such as public lighting, illuminated street maps and advertising, and to be installed in areas of dense human traffic such as city centers, underground stations and school corridors.

CNN: Green sidewalk makes electricity -- one footstep at a time

Traffic will flow through high-speed underground roadways and aboveground interchanges.

FORBES: American Pyramids