This is also quantitatively correct because for two people coming in from afar you might change two trains or a bus and train and each ticket is at least 3.00$(bus/path from NJ) which is 24$ minimum both ways, with more than two it would make even more sense to take the car.

Congestion pricing brings in a toll above the 16$ you pay throu the tunnel. I think it's 18, So 34$ total?

So you are incentivized to get more than 2 people by car. Less traffic.