Which speed is generally considered the upper limit of crash survivability for most pedestrians and cyclists?

• A. 19 mph (30 kph)
• B. 10 mph
• C. 30 mph
• D. 25 mph

Answer: (A)

Crashes involve a lot of energy, and the body can withstand only so much impact before serious injury or death becomes likely. For pedestrians and cyclists, there is a practical speed below which most people can survive a collision because the forces are lower and can be absorbed more safely by the vehicle and the ground. About 19 mph (30 km/h) is widely cited as that upper survivability limit for most people. Below this speed, the chance of fatal injury remains relatively low, while above it the risk rises sharply as impact energy increases with speed. So this speed is considered the threshold where survivability is generally achievable for most pedestrians and cyclists. The other options are speeds where injuries and fatalities become more likely, so they don’t represent the practical survivability limit.