Causes might be attributed to driver-behavior ... When a traffic collision does not lead to death, the most ... drive a vehicle on a highway at a speed

Answer:

Vehicular collision's impact greatly damages the car and the persons inside, which is why we have seat belts. But sometimes, the impact is too great that the car could even flip over and you'd be affected too. With the glass in front of you, you could lose a lot of blood too. It is considered a miracle if you survive such an accident.