To promote the public safety; to preserve the recreational value of public travel on the state’s highways; to preserve the natural beauty and aesthetic features of such highways and adjacent areas; to provide information about and direct travelers to public accommodations, services for the traveling public, campgrounds, parks, recreational areas and points of scenic, historic, cultural and educational interest, it is the policy of this state and the purpose of ORS 377.700 to 377.844 and 377.992:
(1) To establish official information centers and motorist informational signs, including sign plazas or travel plazas in appropriate locations.
(2) To provide for publication and distribution of official guidebooks and other publications.
(3) To prohibit the indiscriminate use of other outdoor advertising.
(4) To provide motorists, where feasible, with information and access to communications systems for emergency and travel-related purposes.