What is a major contributing factor to motor vehicle crashes according to research?

Excessive speed is a significant contributing factor to motor vehicle crashes because it reduces a driver's ability to react to sudden changes in traffic or road conditions, increases stopping distances, and can lead to more severe collisions. Research consistently shows that higher speeds are associated with more severe accidents, as the kinetic energy released in a crash increases with speed, resulting in a greater likelihood of injury or fatality. While distracted driving, weather conditions, and vehicle malfunctions also play crucial roles in road safety, the direct link between excessive speed and the severity of crashes makes it a major factor in many accident statistics. Understanding this connection highlights the importance of adhering to speed limits and adjusting driving behavior according to road conditions for overall safety.