The higher the speed of a vehicle, the more likely it is to cause severe injury or death to a pedestrian in the event of a collision. In fact, a pedestrian is much more likely to be killed in a collision with a vehicle traveling at 40 mph than at 30 mph. The impact of a vehicle traveling at high speed can cause serious and life-changing injuries to a pedestrian, including traumatic brain injury, spinal cord injury, and multiple fractures.