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Traveled vehicle miles.

The models research research calculate estimated probabilities on accident data. Of the 204,382 accidents on highways in 2004, resulted in 21 % of the injuries, and about 0.4 % were fatal. The same %ages were seen in the 182,922 accidents in 2006. Comparing only highways, where the speed limit rose to 70 showed virtually no change from 2004 to 2006.. This is because the research has not been able to disentangle convincingly the effects of speed limit changes on factors such as speed enforcement; traveled vehicle miles, vehicle occupancy, seatbelt use, alcohol; proportions of passenger cars, minivans, pickup trucks and sport utility vehicles and vehicle safety features, including air bags and ABS brakes.

The maximum increase was the 30th Indiana State to raise interstate speed limits up to 70 mph on rural highways. Saved lives,ury. -by other researchers suggest even higher speed limits on motorways in no in no increase in the probability of serious injury.