The states of the world invest very much money for the construction and maintenance of roads since roads are considered very important in the transportation sector as an indispensable tool. Roads are used to transport goods and persons from one place to anotherSo the process of maintenance management for roads networks is considered very important because it needs various kinds of resources. This process must be completed with a very high degree of accuracy to achieve more profit of available resources and to keep on the acceptable level of service for these road networks.therefore, the significance of this book lies in dealing with an important area of the constructional and urban development, which is the flexible pavement maintenance operations.