I thought I'd seen this before, but can't find any references to it on AU.
One Proposal For Amtrak Bullet Train Route: Under Long Island Sound
One Proposal For Amtrak Bullet Train Route: Under Long Island Sound
As Amtrak studies how to bring bullet trains to its frantically busy Northeast Corridor, one design team is suggesting a radically new route requiring a roughly 18-mile-long tunnel beneath Long Island Sound.
Trains speeding from Washington to Boston would run through the heart of Long Island, cross into Connecticut through a tunnel emerging in Milford, head to Hartford and then race east toward Worcester on new tracks running alongside I-84.
The segment between Manhattan and Hartford would cost about $20 billion, according to the University of Pennsylvania's high-speed rail design studio, which first put forward the idea in 2010. Overall, the full 450-mile route from Washington to Boston would cost about $100 billion, PennDesign said.