Haha i get what youre saying now. Well the issue would be the wheels hitting so they would need to be moved more to the inside (when the cars are connected). And a major thing would be if the human brain could actually function and perform these 2 tasks effectively. Personally I think it is a possible idea of joining two cars the way yuo explained, but for one normal person to drive it would be impossible. I guess the other option is having one accelerator and one brake for both cars (assuming they are both automatics) but i guess that makes one car.
Does this make any sense? Haha i hope it does