The Peruvian coast presents favorable situations of soil resistance. However, as the road network moves away from it, there are various problems depending on the area it crosses. It is appreciated that design techniques are used indiscriminately. The problem is accentuated when the penetration roads follow a transversal path to the country and are formed by fillings or embankments in the great extensions of the coast. Then the tracks change mid-slope when they start to climb; they change in the high plateau zone where it corresponds to large flat areas with fine soils that are permanently saturated, with severe weathering and that their topography prevents natural drainage. Afterwards, the high jungle is presented with steep slopes, with a tropical climate, with mid-slope roads formed by fine soils, perhaps with less humidity, but partially susceptible to deformations; until reaching the low jungle area with drainage problems, fine soils, intense and intermittent rains, highly susceptible to deformations, with flat topography and scarcity of granular materials. To give an example, the Pisco highway- Ayacucho, known as the Los Libertadores route, begins on the coast and reaches as far as the Apu-rímac river valley, showing different altitude, climate, precipitation, and especially soil types.
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