That picture is gruesome. The more people downsize the safer it will be.
I agree on more mass softens the impact, but so do advanced airbags, seatbelts, collapsible steering columns. We don't need 3 ton SUV's in every parking spot at grocery store. And that same SUV will stand no chance against a Semi. There is always something bigger than you on road.
God decides who lives/dies not your car.
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