Road works

On some sites you will first need to demolish houses and other structures that impede construction. After that, proceed to one of the main processes - the excavation and moving huge amounts of soil and rocks, and up to tens of millions of tons.
That the line lay on a horizontal surface, large masses of soil from the raised territories pour in low-lying areas. This method is called working with the bookmark. Taken while routing the top layer of soil is used to cover road shoulders, embankments, and the Central dividing strips, and then planted with a grass and other vegetation.
To drain water to the edges of the road surface has a convex shape (curvature profile). At the beginning of construction for water collection laid for a powerful drainage system.
There are three major components of the pavement: the underlying surface, the base and cover, all together, they determine the stiffness of the coating. A hard surface made of concrete slabs, the joints between them filled with plastic sealant, which provides elasticity in the case of fluctuations of loads on the track. Not hard - cover "black gravel", i.e. a mixture of crushed stone or sand with coal tar or petroleum bitumen. Such coatings are called "tarmacadam" or "macadami with bitumen impregnation". Road surface bitumen also known as asphalt, and both versions (with Degteva and bitumen impregnation) is called the asphalt.
The coatings of both types of the underlying surface consists of compacted crushed stone or gravel. The basis of roads that are paved, usually concrete, and with unsteady from the "black gravel".