Now you're just making a videogame. And it would exceed the height limit for an 18-wheeler, you wouldn't be able to go under many bridges. If you made the mai

Now you're just making a videogame. And it would exceed the height limit for an 18-wheeler, you wouldn't be able to go under many bridges. If you made the main trailer shorter to add room for hand-rails on the top, then you've lost cargo space.