Any car before it is allowed to operation, has to pass technical inspection. Survey is done by experts of the service ensuring traffic safety.
At each owner of the vehicle surely have to be:
first-aid kit,
fire extinguisher,
emergency sign, and also
antiretractable emphasis.
Antiretractable emphasis - general information
For what it is necessary? It is even easy for school student to understand purpose of this subject. The antiretractable emphasis is necessary in case of need to rest, without allowing any kickback of the car. Such trouble can happen to the car located on a natural bias of the district. Or if the car underwent unplanned physical impact.
Automobile antiretractable emphasis is usually placed from the strong plastic having the form of a rectangular triangle. One of its parties has a characteristic bend. The antiretractable emphasis is enclosed under wheels of the leading bridges both cargo, and the cars which are in the parking mode.
It is also surely recommended to enclose surely an antiretractable emphasis under a wheel which is located on diagonal to that which the driver is going to lift a jack to change.
Traffic regulations oblige each owner of the car to have at least 1 antiretractable emphasis. By trucks with the allowed maximum weight more than 3,5 t and buses with the allowed maximum weight more than 5 t surely there have to be not less than 2 antiretractable emphasis.
Such antiretractable emphasis in the people calls a boot. Enclose such antiretractable boots as well under wheels of engines and locomotives, railway cars, self-propelled carts, etc. But for railroad workers antiretractable boots usually are made of strong metal, often use an intrinsically safe covering.
Usually owners of cars store an antiretractable emphasis near a spare wheel, that is in a luggage carrier. Owners of trucks have to place an antiretractable emphasis in close proximity to the place where it will be applied, having fixed in a special arm. That it was possible to stop, leave, give a hand, to remove an emphasis and to put it under a wheel.
Generally antiretractable boots emphasis appeared in human history long ago. Most likely, they were thought up right after the invention of a wheel.
If to use a wheel without emphasis, it is fraught with premature or sudden damage of the vehicle, and also the property which is nearby. One word, to a wheel and an antiretractable emphasis the friend without friend — in any way! They are unseparable as "twin brothers".
P.S. Use the additional equipment for trailers intelligently and competently, study and know technical characteristics!