This road tunnel under the Thames in London comprises two traffic tubes, the older being made of cast iron. As a result, the tunnel is particularly sensitive to high temperatures, while at the same time, it has an extremely high traffic volume. The tunnels comprised several special risk factors and were no longer able to comply with the latest EU safety guidelines. FOGTEC conducted project-based fire tests and installed a firefighting system equipped with a SIL2-certified control system based on gained knowledge and parameters. This enabled the operator to perform system checks via remote maintenance without the use of water in the tunnel, which considerably lowered the maintenance costs.
