Is there a specific reason a land ferry system not as popular?

In simple terms , simply loading trucks and/or other vehicles on seamlessly designed train cars for longer distance transportation.

The logic is increased speed, lower carbon footprint (if electric) and the increased extra weight compensated by much lower rolling resistance of train. Also lower labor costs and more rest for drivers + less wear and tear on highways. In my opinion highways should only be used where no rails exist or for final 200-300 miles, this will make electric semis much more feasible.

Anything i am missing. I guess all that is needed to make something like this work on a busy corridor exists today.

For cargo, I think containers solve that better on longer distances. There’s no need to transport trucks and waste truck driver working hours.

On short distances I would guess time spent loading and unloading would be a problem.