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Comprehensive Plan Transportation Element employment centers, and commercial centers, with low levels of mobility. Roads with a higher functional classification are considered limited access facilities with high levels of mobility. For example, the Interstate Highway System is a sub classification of the highest functional class, principal arterials, and is characterized by long distance travel patterns and relatively high speeds. Provisions are not made for direct land use access from the Interstate system itself. Instead, interchanges with other highways are provided at discrete intervals, and land access is generally provided off of those highways, making the Interstate a limited-access facility. According to Florida Administrative Code Section 9J- 5 . 019(5b), comprehensive plans must depict the existing FDOT roadway functional classification on the existing traffic circulation map or map series. Existing and future functional classification for roadways in Indian River County are depicted in Figures 4 . 3 . 1 and 4 . 3 . 2 respectively. From a planning standpoint, functional classification is important for five reasons : 1 . Functional classification groups together those facilities requiring the same level of technical, managerial and financial competence for design, construction, maintenance and operation; 2 . It achieves a high degree of intergovernmental coordination by delineating jurisdictional responsibilities; 3 . It provides for the integrated and systematic planning as well as the orderly development of highway construction and improvement programs in accordance with actual needs; 4 . It permits the clear and logical application of funding policies to specific types of highways in that functional classification is used to determine which roadways are eligible for federal funding ; 5 . It provides stability in system responsibilities, since functional characteristics do not fluctuate significantly over time. In the past, FDOT maintained two functional classification systems, state and federal, which differed in the way roadways were classified. While the state system classified roadways based on existing conditions , the federal functional classification was based on a roadway' s function about ten years into the future . In 1993 , the federal functional classification system was revised to represent current roadway conditions, thus making the state and federal systems similar. As adopted, the Transportation Element uses the federal functional classification system which the Florida Department of Transportation also uses . Table 4.7 . 1 lists each thoroughfare plan roadway by its functional classification, name, existing functional type, and other characteristics . Roadway Volumes Community Development Department Indian River County 10