In the framework of knowledge exchange in the field of development and improvement of methods and exchange of scientific and practical experiences in the same field to benefit from the expertise in the field of materials used in the construction and maintenance of roads in general and stone foundation materials in particular. As part of the keenness of the Public Services Department to receive visiting delegations internal and external to see the best experiences and methods and practices, the Public Services Department received a delegation from the Ministry of Municipal and Rural Affairs - Secretariat of the Eastern Region (General Department of Supervision) from Saudi Arabia headed by M/ Majid Al-Qurashi - Director General of Supervision and M/ Abdulrahman Al-Zahrani, Director General of Project Efficiency and M/ Abdulaziz Assistant Director General of Project Efficiency and M. Fayez Al-Shahri, Director of The Department of Road Supervision, and the ministry comes to see the best practices. Applied in the field of road development and improvement and exchange of experiences.