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That's some serious ice layers if it not only derails a train but supports its weight over to the road.
That's a railroad crossing, it isn't free driving.
It's difficult to see because of the compression noise but it looks like the train is on the tracks. The tracks are just so covered with ice it looks like there are no tracks. Snow and ice are nothing to a train, leaves on the other hand can make tracks dangerous.
I've seen a documentary about a train making a year long route around the entire world during ice age and it was still able to break though the ice. This is just bad engineering.
The contact patch of the wheels on a train is roughly 90,000 PSI of vertical pressure. You need a lot of ice to derail a train.