You just invented the car train / motorail. Amtrack even operate one!

https://en.wikipedia.org/wiki/Motorail

Theres also https://en.wikipedia.org/wiki/Car_shuttle_train but they generally are shorter distance

No, it is not it. The idea is that the living module or RV is still occupied during the travel unlike the motorail, where passengers are traveling in separate passenger cars. Car shuttle trains where passengers stay inside the vehicle also do not offer connection of utilities to RV. And my idea goes further where living module is disconnected from engine/wheels platform when loaded on the train (if the design is standardized similarly to containers, you can get new one at the destination, so the train carries less weight).

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Maxion 6 days ago | parent [-]

Weight is not really an issue for trains, RVs / cars weigh absolutely nothing in comparison to even just a rail car.

For safety reasons you can't really have people sit in their cars on the train. The Eurostar etc. has extensive fire systems et. al. to make it possible.

	▲	ivan_gammel 5 days ago \| parent [-]
		Again, the idea is about new design that can make it possible. It has nothing to do with existing regulations for cars.