That particular boondoggle was called the "Land Train".
Another idea that looked good on paper but was a nightmare in reality.
There was a junkyard in Yuma, AR, that had parts of one of them left that they bought out of Yuma Proving Grounds. I don't think they ever went into production and only a few prototypes were built.
They were powered by a diesel turbine that turned a generator, each wheel had an electric motor in it. They were to be used in the artic and desert environments where convoys of trucks could not go.
It had a "locomotive" where the crew operated it from and the engine/genny was located. It also had a kitchen, restrooms, crews quarters and freight cars.
Your tax dollars at work.
I visted that junkyard a few times and spoke to the owner about how he ahd acquired it. Seems he had a "connection" at the proving grounds and bought it for pennies on the dollar. It was so big he couldn't keep it whole. It was mostly aluminum so every tiime he needed quick cash he scrapped some more of it.
When I saw it there was only the control cabin, engine room and part of the crews quarters left.
There may be one whole example left but I can't remember.