With future proposed tunnel projects requiring deeper tunnel designs, it is important to see how far tunnel construction has progressed and how far is left.
When the TBM Mary Ann broke through into Birmingham from Warwickshire, it was not only a milestone for the Bromford Tunnel but also for the entire HS2 project.
One of the biggest frustrations commuters have with tunnels is dropped calls and a lack of mobile signal caused by a dead zone, but could this be fixed now?
The Silvertown Tunnel underneath the River Thames opened in April 2025 but whilst the concept was proposed for decades, it remarkably opened ahead of schedule.
The transatlantic tunnel is one of the most ambitious tunnel projects ever conceived, one currently believed to be impossible. What would it take to build it?
With a planned Shetland Islands tunnel project reaching a breakthrough stage, it is important to look at the proposals, planning and potential implementation.
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