Comment by ivan_gammel a day ago
Crazy idea based on this: a mobile home that can be put either on rail car or electric car platform. Those platforms are pooled and can be rented at designated stations. Or maybe a platform where you can simply park and connect your RV. You basically outsource driving for the significant part of your travel and just enjoy the road. Also better for the environment.
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).
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.
Again, the idea is about new design that can make it possible. It has nothing to do with existing regulations for cars.
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