Over the years a number of federal standards have been established to strengthen the design of passenger vehicles in order to protect the occupants of the vehicles. Car manufacturers undertake crash tests, to ensure that the defined standards are met. However crash testing in simulated conditions in the lab or enclosed areas may at times not be enough, in real accidents the design defects would become disastrously apparent. These defects will become highly apparent when the vehicle experiences a tragic roof crush accident.
Many SUVs are known to have an inadequate roof structure either because of poorly placed roof pillars or due to some design flaws. In the event of the SUV rolling over in an accident, the roof caves in.