[yholio]

Because trains are known to split into family sized units that continue the journey on roads using battery power?

The public transport trope is tiresome and unlikely to prevent the warming of the planet with a single fraction of a degree.

[Ourgon]

Car trains (or "Motorails") do. Park your car on the train at the head station, drive it off the train at the destination after having spent the night in a sleeper cabin and drive on to where you want to go. Since trains are electric it would be easy to retrofit the car carriers with charging infrastructure to make sure EVs are topped up for the "fan-out". Everything but the charging infrastructure is already in place and in use, at least in Europe - from the Netherlands [1] you can take such trains to Switzerland, Germany, Italy, Austria, Finland, Croatia, Slovakia and Turkey (via Austria).

[1] https://www.treinreiswinkel.nl/reizen/autotrein