Over the years, the demands on the regional planning commission (RPCs) have changed. These changes, however, have not altered the basic advisory role of the commissions. The original and traditional role of the commissions was to plan for the physical development of the areas they served. This involved planning issues, such as land use, transportation, natural resources, and water and sewer services. While this function has continued to be important, technical assistance in such areas as economic development, grant and loan services, and local government management.