Fixed Fire Fighting Systems (FFFS) have been routinely used in road tunnels in countries such as Japan and Australia for decades, and there is increased interest in the use of FFFS in parts of Europe, North America and Asia.

Large fire events in road tunnels continue to show the consequences of such an event. These consequences can be to the users, the tunnel infrastructure, and the impact to the wider road network on society. This has maintained the pressure for further improvements to techniques and technologies to manage the risk and consequence of fires in road tunnels. FFFS are increasingly seen as a method that can deliver user safety and infrastructure protection, and can be used as a risk reduction measure. However, their use is not widespread for various political, economic, technical and social reasons. It is still recognised that FFFS may not be the most appropriate measure to adopt in all circumstances or in all locations.