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If something is just beyond the headlights (or even too close) between your periods of looking forward, it can be laying in the middle of the road and you not see it.
originally posted by: roadgravel
Isn't a driver required to check the road.
originally posted by: Sremmos80
And the car lengths thing has to do with speed and the amount of time it takes for the brakes to stop the momentum, has nothing to do with the amount of time it takes for your brain to send the signal. Takes MUCH less then a second to get your foot from the gas to the brake, let alone for your brain to send the signal to your foot.
The Three Stages of Braking
Bringing a car to a stop requires three actions to occur:
1.Your brain must recognize the need to brake. This can take a heck of a lot longer for a new driver than an experienced driver. New drivers simply don’t have the experience to recognize when the cars in front of them are slowing down. An alert driver may make this decision in 3/4 of a second. A new driver may take up to two seconds.
2.You must move your foot into braking position. This may require moving your foot from the accelerator to the brake. This takes the average driver 3/4 of a second.
3.Finally, you must apply pressure to the brake.
During the time in which your teen is deciding to brake and moving their foot to the pedal, their car is continuing at the same speed toward the car in front of it.
Check out the chart below which illustrates just how far the car travels during these stages of braking.
1. Assumes 1.25 second reaction time.
2. Assumes 0.75 second “foot to pedal” time.
3. Based upon the Vehicle Stopping Distance Calculator from CSGNetwork.com with a coefficient of friction of 0.7.
* 1 mph = 1.4666 feet per second.