Carry On Luggage Specifications Can You Carry Luggage Cart Onto JFK Air Train ?

Can you carry Luggage cart onto JFK Air Train ? - carry on luggage specifications

I will take the flight to Raleigh, North Carolina at JFK airport, and very likely I will in the terminal 8, and from there it goes to Terminal 4 of the Swiss Air Force. I will have 2 bags and carry me, so I can be a baggage car on the train or airplane has a bus or a taxi?