braking distance

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Braking Distance


the distance traveled by a motor vehicle, train, or streetcar from the instant a braking device is applied until a complete stop is achieved. The total braking distance, or stopping distance, includes the distance traveled from the instant the driver or engineer perceives the need to stop until the brakes are applied. The braking distance is proportional to the square of the velocity, the brake response speed, the load on the wheels to which the braking action is applied, and the coefficient of adhesion between the wheels and the road or tracks; the total braking distance also depends on the reaction time of the driver or engineer. The state of the tire tread and the road surface also have a great effect on the braking distance of motor vehicles.

In the USSR, in accordance with the Road Traffic Rules, the maximum permissible braking distance for a road vehicle at a velocity of 30 km/hr on a dry, level, hard road surface is 7.2 m for passenger cars, 9.5–11 m for trucks, and 7.5–8.2 m for motorcycles. The calculated braking distances for trains are established in the Regulations for the Technical Operation of Railroads.


braking distance

The distance within which an airplane can be brought to a stop when rolling on the ground at any given speed.
References in periodicals archive ?
Overloading increases tyre wear and fuel consumption, adversely affects vehicle handling and stability, and increases the braking distance.
Bautista said the accident was caused by "tailing and insufficient braking distance.
CBS is an easy to operate feature that reduces braking distance by 32% compared to conventional braking.
This incorporates your reaction time and safe braking distance.
The most common form of transport in this country is cars, and with the excessive driving on a daily basis occurring here, low tread on tyres significantly increases the braking distance of a vehicle.
The basic rule of rail transport safety, namely, lies in the fact that the minimal block length has to contain at least the value of the longest stipulated train braking distance on this section of the railway line, and since this distance is different for different trains the longest one is always the valid one (Pachl, 2004).
In the tests the two cars were used to highlight the differences in braking distance and cornering performance between the standard-fitment summer tyres and Michelin's Primacy Alpin winter tyres.
This amounts to a reduction in braking distance of 3.
This shows that at 60mph these specially developed tyres have a braking distance in wet conditions of 66.
The difference in braking distance can be as much as a car length, so it's definitely worth changing before it gets deep and crisp and even.
This will enable breakthrough applications that improve car efficiency and safety like improved braking distance or slip control," said Philips.