@article{ref1,
title="Smoke movement and control in tunnels under construction: recent research progress and future directions",
journal="Fire (Basel, Switzerland)",
year="2023",
author="Yao, Yongzheng and Xia, Ziyang and Wang, Rui and Ren, Fei and Gao, Zihe and Zhao, Jinlong and Wang, Qiang",
volume="6",
number="5",
pages="e191-e191",
abstract="China is the country with the largest number of tunnels, the largest tunnel construction scale, and the fastest development of tunnels in the world. Figure 1 shows the development history of metro and highway tunnels; it can be seen that tunnels have experienced rapid development in recent years. By the end of the year of 2021, there were a total of 23,268 highway tunnels, with a total length of 24,698.9 kilometers [1]; 7209.7 km of this distance is made up of tunnels operating the metro in China [2].<p /> <p>Language: en</p>",
language="en",
issn="2571-6255",
doi="10.3390/fire6050191",
url="http://dx.doi.org/10.3390/fire6050191"
}