Smart ARC II - Solve the Hudson River Bottleneck
Amazingly, only two passenger railroad tracks cross the Hudson into NYC and freight trains must take a 280 mile detour north to get back to NYC and Long Island. This is why over 90% of freight comes in by truck and think what that does to traffic congestion and pollution.
When the Penn Tubes were built 100 years ago, NYC and Long Island had fewer than 4 million people. Back then, most products arrived by ship and ferry. Now the population is over 11 million and people buy a lot more stuff these days.
The Smart ARC II Tunnel is double the diameter at 52 feet (60 feet is now possible) and the exponential increase allows 4 railroad tracks, including heavy freight lines directly into NYC. A single big tunnel requires less structural concrete lining than two small tunnels at half the diameter. Only one tunnel boring machine is needed and there are four tracks instead of two.
Single-track twin tubes bored through solid rock, like the new 7 Train Extension, is Victorian Overbuild at its worst. A very small tunnel was all that engineering and technology could handle 100 years ago.
Things have changed.


