Section 17-4-2 - Definitions of roads comprising state road systemThe following meanings shall be ascribed to roads comprising the state road system:
(a) "Expressway." -- Serves major intrastate and interstate travel, including federal interstate routes.(b) "Trunkline." -- Serves major city to city travel.(c) "Feeder." -- Serves community to community travel or collects and feeds traffic to the higher systems or both.(d) "State local service." -- Localized arterial and spur roads which provide land access and socioeconomic benefits to abutting properties.(e) "Park and forest." -- Serves travel within state parks, state forests and public hunting and fishing areas.