The Tyne Tunnel uses a high-pressure water-mist fire-suppression system to quickly cool and extinguish blazes within the river crossing [1, 2].
This technology is critical for tunnel safety because confined underground spaces can trap heat and smoke, potentially compromising the structural integrity of the tunnel and endangering drivers during an emergency.
The system is designed to deliver up to 10,000 litres of water per minute to cool a fire [3]. By creating a fine mist, the system can suppress flames in seconds, which protects the tunnel infrastructure, and ensures a safer environment for motorists [1, 3].
“The mist is actually a fire-suppression system that can put out a blaze in seconds,” Tom Scott said [1].
Maintenance of the tunnel infrastructure has required significant scheduling adjustments in recent years. The northbound carriageway was subject to weekend closures for more than 12 months [2]. These closures began in June 2023 to allow for essential works [2].
The disruption ended when the northbound carriageway fully reopened on Sept. 2, 2024 [2]. A spokesperson for Tyne Tunnel Ltd said the northbound carriageway has now fully reopened after more than a year of weekend closures [2].
The tunnel, which links North Tyneside and South Tyneside in England, relies on these integrated safety systems to maintain traffic flow under the River Tyne [1, 2]. The combination of high-volume water delivery and rapid deployment allows the operator to manage the high risks associated with vehicle fires in enclosed spaces [3].
“The mist is actually a fire-suppression system that can put out a blaze in seconds.”
The use of high-pressure water mist represents a specialized engineering approach to urban transit safety. By prioritizing rapid cooling and suppression over traditional soaking methods, the Tyne Tunnel reduces the risk of structural collapse and accelerates the reopening of the artery after an incident, minimizing economic disruption for the Tyneside region.
