Fritsch_the_cat
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Well, it gives the exact speed at the time of the accident, when the airbags deploy, but by then brakes have most likely been applied and it's going to give a slower speed than they were going before that. So using skid mark data combined with black box info, they average it out. I would imagine that even if there were no skid marks, the speed on the black box would still have been enough for the charge.Another article said they had the exact speed at time of accident. Black boxes collect data like the speed upon impact/deployment of air bags. My buddy works for GM and verified this.