Quote:
Originally Posted by aquablue
I don't think that is possible. No connection to GCT for NJT. Amtrak uses overhead so does NJT, GCT uses third rail.
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Power supply isn't an issue. You can easily install multiple systems along the same tracks. The East River Tunnels have both catenary (for Amtrak and NJT) and third rail (for LIRR) as do several tracks at Penn that are shared by LIRR and NJT. The same could be easily done at GCT.
The obstacle to building a tunnel between Penn Station and GCT is the proximity to Water Tunnel Number 1 which, if damaged during construction, would be catastrophic to the city. There's also a lot of other infrastructure in the way that a connecting tunnel would have to carefully wend its way around. Not impossible, but very difficult.