# How to calculate the stopping distance .

When novice driver sits behind the wheel, after two or three trips, he is convinced by personal experience: the braking distance is not always the same.In some situations, this distance is vital, therefore, everyone must be able to calculate the braking distance of your car.

1 From the point of view of the theory, the braking distance - a distance that broke the vehicle from the moment you press the brake pedal to a full stop.This figure is dependent on several factors: speed, road surface, brake wear, variety of tires and their condition.

2
for stopping distance calculation formula applies S = Ke x V x V / (x 254 fs).Marking the S - is the stopping distance in meters, Ke - braking rate (for passenger cars, the figure is equal to one), the V - initial speed (km / h), fs - coefficient of adhesion with the road.The latter value depends on the weather: dry asphalt it is equal to 0.7, for the wet - 0.4 for compacted snow - 0.2 and at ice - 0.1.

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But when driving the driver not to formulas, he is interested in specific figures.And this case is known to the average in a normal way.At a speed of 60 km / h braking distance is about 17 meters at 90 km / h - 50-60 meters, and a speed of 120 - from 90 meters or more.Note: If the speed is doubled, the stopping distance is increased by 4 times!

4
important to realize that the stopping distance is caused also by other factors.The driver, seeing the obstacle must decide braking, move the leg to the corresponding pedal, press it.In professional riders it will take 0.3 seconds, a novice behind the wheel - from 1.7.In addition, the braking system is also not triggered immediately.Passenger car slowed down by 0.1-0.3 seconds, followed by another 0.3-0.5 with the braking force will increase from zero to the maximum value.All this is only a moment, but the car is moving, the obstacle is closer by the second.

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To reduce the risk of sudden braking, enough to follow a few rules.In fact correlate with the speed of traffic conditions.Keep sufficient distance to ahead going car, in the event of sharp braking it you have time to react.The newer passenger car, so it can be shorter braking distances.And vice versa: not tunable to trucks and buses, because their braking system takes longer to stop.Do not get distracted, and if possible to monitor the situation on the road through the glass front of the machine.Inspect brake pads for wear and tear and hoses, promptly repair the fault.

Remember, press the brake pedal to the limit, you can lock the wheels completely, then the machine will become unmanageable.Be careful on the road, follow a moderate-speed mode, and will be able to protect themselves, their passengers and other road users of road accidents.