We already had that in the 70s and 80s. Those were RoRo trains.

You put your car on a drive on ramp. Go into the comfy cabin, maybe even a sleeper cabin for over night journeys. Get out at the other end, drive your car down the carrier and explore the area that you’ve journeyed to with the vehicle that you own. Look up the 89s ABC film about the Ghan railway closing down.

I live in Australia and love seeing the distant from my home centre of tue country. Unfortunately long distance trains here have become a lifestyle luxury experience rather than transportation. Same goes for bicycles amd motorcycles.