Vehicular accidents with dinosaurs.

At worse, vehicular accidents are injurious and painful to the modern animals we know and depending on the speed they can cause tremendous damage to the car and potential death to the human driver. Even if animals survive I doubt they often get veterinary care, they'd either live with the pain or die by it.

This is just with moose, deer, bears. Of course it's tremendously worse with a train. I have no doubt that prehistoric megafauna would suffer the same but I do wonder if their size makes their odds better, or perhaps worse in the aspect of being durable enough to survive and live with injury. I think they have greater odds at surviving a car or truck, and I often think about how the odds would be against a human driver if they accidentally ran into a Ceratopsid, Ankylosaurid, Stegosaurid, or even a sauropod. Even if the animals escape with minimal injury the cars may be totalled. Plus needless to say the majority of large megafauna be it mammal or saurian lived in North America, though there are some exceptions like Paraceratherium or Paleoloxodon.