At 20 mph, how many feet does it take for an average driver to apply their brakes once danger is detected?

At a speed of 20 mph, it takes an average driver approximately 44 feet to come to a complete stop after detecting danger and applying the brakes. This distance includes both the perception-reaction time (the time it takes for the driver to recognize the need to stop and react) and the actual braking distance.

Under typical conditions, a driver usually has a perception-reaction time of about 1.5 seconds. During this time, the vehicle continues to travel, covering a specific distance before the driver even starts to brake. After the brakes are applied, the vehicle will then decelerate over a certain distance. The combination of these distances results in the 44 feet required to stop at that speed.

Understanding this concept emphasizes the importance of maintaining a safe following distance and being aware of your speed, as stopping distances can vary significantly based on speed and road conditions. This information serves as a valuable reminder for all drivers to stay alert and ready to react to any potential hazards on the road.