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.

It makes driving more appealing if one discounts the best alternative use of the funds, which humans are irrationally likely to do. That driving seems better is because people suck at thinking about what else they might do with the money given compound returns on its investment.