Estimated fatality change (%) per 100 lbs mass reduction with constant footprint.

Lower estimate (%)Upper estimate (%)
Cars below 2,950 pounds1.022.21
Cars above 2,950 pounds0.440.90
Light trucks below 3,870 pounds0.410.17
Light trucks above 3,870 pounds−0.73−1.90

Source: Final Regulatory Impact Analysis: Corporate Average Fuel Economy for MY 2012-MY 2016 Passenger Cars and Light Trucks, 469.