The speed a car is traveling when it strikes a pedestrian has a massive impact on the odds that the pedestrian will be killed. Obviously, the faster the car is going, the greater the chances of death. However, it's interesting to dig into the numbers a bit further and see that the real swing happens at 45 miles per hour, when all age groups are more likely to be killed than to survive.
At just 20 miles per hour, most people will live. Those who are 70 years old will die in 13 percent of cases, those who are 30 will be killed in 3 percent, and the average is just 7 percent. It's highly more likely that anyone involved in a low-speed crash will live.