Secundum statistics circiter LXXX% de summus gradu exitus viarum, quae sunt completed et aperuit ad negotiationis in patria sunt bitumen pavimentis. Tamen, cum progressionem temporis, in potentia diversis caeli et environmental factores, et actiones summus intensionem driving onerat, bitumen pavimentis et deteriorare. Diversis gradus degradation vel damnum fieri, et pavimentum stratum sustentationem est ad capere efficax technica modo ad tardus in hoc degradation ut in pavimentum stratum, ut bonum servitium qualis durante suum servitium vitae.

It is understood that some companies in the United States have concluded through tracking research on hundreds of thousands of kilometers of highways of different grades and a large number of maintenance and repair practice statistics: for every one yuan invested in preventive maintenance funds, 3-10 yuan can be saved in later corrective maintenance funds. Conclusio. Eventus autem opportuna Research Plan in semita in Civitatibus Foederatis Americae sunt etiam includitur in sumptus. Si Praecaventur sustentationem est de 3-4 temporibus per totam pavimentum stratum vitae cycle, XLV% -50% de subsequent sustentacionem costs potest salvus erit. In our country, we have always been "emphasis on construction and neglect of maintenance", which to a large extent has led to a large number of early damage to the road surface, failing to meet the service level required by the design, increasing the traffic operation cost of road use, and causing Bad social impact. Igitur pertinet via administratione departments operam ad sustentationem viae et ne reducere variis morbis in via superficiem, ita ut nostra via superficieficibus boni qualis.