Increased speed makes the laws of physics more and more important for the driver. These laws, although not enforced by a police officer or written by a legal body, are absolutely binding on all drivers and no one can mitigate their effects. The laws of physics control every moving object. The specific laws that apply to driving include areas such as friction, centrifugal force and inertia, impact and specific gravity. It should always be remembered that these laws apply to both urban and motorway driving, as their importance increases in proportion to the speed at which you drive. However, this article on motorway driving seems to be the best place to discuss their importance.
Good vision requires enough light and time to superimpose the image on the retina of the eye, be transmitted to the brain, and thus trigger the driver’s reaction. This means that traffic signs, traffic lights and pavement signs are becoming increasingly important when driving at higher speeds. This means that the driver is warned in advance of any corners, hills, crossings or crossings that may be ahead, as well as of planned manoeuvres by other drivers. The driver must learn to recognize all signs and signals immediately as the recognition and response time becomes shorter and shorter at higher speeds. To facilitate recognition, signs and signals throughout the United States are standardized in shape and colour and can reflect light that can be viewed at night. Remember that observing a sign, signal or state takes time to observe and then react to it. The response time for a given driver is quite constant, but the distance travelled during this time is directly related to speed. Therefore, stopping distances and bypassing distances become greater as speed increases.
Friction is the force opposing the movement of one surface above the other and is the centre through which the vehicle can either move in a straight line or rotate or stop. This force is exerted entirely by four small areas of friction, also known as tyres. If we assume that the average response time is 0.75 seconds than common sense tells us that the faster the car travels, the longer the distance it will take to stop. The difference in stopping distance from 40 miles per hour to 70 miles per hour is about 3.5 times greater. This means that if you can stop within a radius of 100 feet at 40 miles per hour, you will need 350 feet of freedom to stop at 70 miles per hour.
These conditions only occur for part of the time, but if the friction is reduced by ice, snow, rain, oil, mud, loose gravel, rough ground or weak tires, stopping distances will increase dramatically, and manoeuvring out of the way will become much more difficult, if not impossible. As the stopping distance increases faster than the speed, it is important to allow a greater distance between the car and the car in front as the speed increases.
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