Am 09.04.2020 um 17:02 schrieb csipromo via groups.io:
I am also curious about how the leading ROLA car went completelyWhy should it be a problem? It is a fact and in this accident we can say that it was a big advantage and helped the lorry drivers to survive.
The ROLA cars must have the floor as deep as possible to let enough height for the 4 m of the lorries. Thus the wheels are reduced to a diameter of 36 or 38 cm. Between the bogies the floor is somewhat lowered. This keeps the edge of the lorries at about 4.40 m above rail.
This allows a simple loading and unloading but requires the standard couplings to be swivel-mounted. They can withstand normal forces in a train but they are clearly the first part to be destroyed in a collision. As seen.