Perhaps every driver has complained the bad traffic. One reason is that there’re too many cars but so few roads. The other one is about the bad road maintenance. For the first problem, there’re many new road projects in “The eleventh five years” plan to solve it. But after building so many kilometers of road, the maintenance problem will become more serious. We should know not only how to build the road, but also how to do the maintenance. With the development of road technology, there’re big changes in this field. Many new technologies have been applied in practice. Here, Construction Machinery invites experts to explain the situation of maintenance in asphalt highway, concrete road, grade road and country road in China. Perhaps every driver has complained the bad traffic. One other is is too many cars but so few roads. The other one is about the bad road maintenance. eleventh five years "plan to solve it. But after building so many kilometers of road, the maintenance problem will become more serious. We should know not only how to build the road, but also how to do the maintenance. With the development of Many new technologies have been applied in practice. Here, Construction machinery invites experts to explain the situation of maintenance in asphalt highway, concrete road, grade road and country road in China.