Smart clothes and roller roads: Sandwich

Racing over a car on the asphalt road, we rarely think that way, though, and is mainly composed of simple natural materials, is a very challenging engineering construction. On the roads today, high tech rules the ball - it employs technology, are guided by GPS and CAD-interpretive model. What is the reason that most of our roads remain, as they say, "leaves much to be"?
Hearing the phrase "road wear" outsiders just think about some of the unpretentious and not too brand article of clothing. Meanwhile, it is a professional term for a set of structural layers of the carriageway. The term accurately reflects the reality - in the construction of roads and highways land is really "dress", and the quality of those "garments" that are hidden under the asphalt smooth surface, has the quality of the entire road crucial.