The **$20 trillion Transatlantic Tunnel** project aiming to connect the U.S. and U.K. is deemed a **"high-risk"** undertaking by megaproject experts.
While there have been **breakthroughs in vacuum technology**, its feasibility for such a large-scale project remains uncertain.
The most discussed route is between **New York City and London**, spanning over **3,000 kilometers**.
Experts cite challenges, noting that underwater construction risks and costs could hinder success, even with **theoretical train speeds** of up to 5,000 mph.
**Professor Bent Flyvbjerg** advises that private entities, like Elon Musk, could assume financial risks if they pursue the project, which currently lacks governmental support.
For more details, visit the original article: Newsweek.