A review of regulations of tunnel smoke control systems

K. W. Ho, Wan Ki Chow, J. Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)


With the rapid development of traffic systems for dense urban areas, many tunnels were constructed. There are deep concerns on fire safety in such vehicular and railway tunnels. Smoke control systems are identified to be an essential fire service installation for providing life safety. However, regulations and associated codes implemented are not yet demonstrated by in-depth research studies. To understand better on designing smoke control systems for tunnels, the current regulations and codes of practices have to be reviewed. A review study on fire codes and design guides for tunnels were carried out and will be reported in this paper. Practices in USA, France, Germany, Switzerland, Norway, UK, Netherlands and Hong Kong were surveyed. As recommended in the international road tunnel design guidelines, the provision of smoke control systems for road tunnels should be based on the traffic condition (bidirectional or unidirectional traffic), traffic intensities, tunnel length and the site location (urban or non-urban area). Natural ventilation is generally accepted to be adopted in road tunnels with length approximately less than 250 m for urban areas with unidirectional traffic. For longitudinal ventilation, it is recommended that the maximum tunnel length can be up to 900 m. However, for tunnels in urban areas with congested conditions, longitudinal ventilation should be allowed only if risk analysis is acceptable and the maximum tunnel length should be within the range of 500 to 600 m. When the tunnel is over 1000 m, smoke extraction over a specified distance must be achieved. A distance of 400 m in an urban tunnel and 600 m in a non-urban tunnel are recommended.
Original languageEnglish
Title of host publicationUECTC'09 - Proceedings of 2009 US-EU-China Thermophysics Conference - Renewable Energy
Publication statusPublished - 1 Dec 2009
Event2009 US-EU-China Thermophysics Conference - Renewable Energy, UECTC'09 - Beijing, China
Duration: 28 May 200930 May 2009


Conference2009 US-EU-China Thermophysics Conference - Renewable Energy, UECTC'09

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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