A graph titled Effect of Blood Alcohol Concentration on Motor Vehicle Crashes shows blood alcohol concentration labeled 0. 00 to 0. 16 on the horizontal axis and relative likelihood of causing a crash on the vertical axis. A line is constant from 0. 00 to 0. 08 and increases after 0. 8. About how much higher is the risk of a vehicle crash at a BAC of 0. 10 percent than a BAC of 0. 00 percent? About how much higher is the risk of a vehicle crash at a BAC of 0. 16 percent than a BAC of 0. 00 percent?.