Roads are grouped into a number of different classifications for administrative, planning and design purposes. The functional classification system creates a hierarchy of classified roads.
Roads are most effectively classified by their function. The primary functions of roads are:
- To move traffic
- To provide access to homes, businesses and other roads
The degree to which these functions are provided is considered an integral part of classifying roads. The main considerations for classifying roads into functional groups are the travel desires of the public, land service needs based on existing and expected land use, and the overall continuity of the system.
The Pierce County functional classification system directly addresses all public roads in unincorporated Pierce County (except state highways).