S.D. Codified Laws § 31-2-23
For the purpose of dissemination of information relative to highway construction, repair, maintenance, and upkeep, and for the purpose of advertising the highways of this state and attracting traffic thereto, the Department of Tourism is empowered to compile and publish any pamphlets, bulletins, and documents it deems necessary and expedient for informational and publicity purposes concerning the highways of the state, to support area travel shows intended to provide a balanced promotion of all areas of and with respect to public parks, recreational grounds, scenic places, and other public places and scenic areas or objects of interest, data as to distances, historical facts, and other items or matters of interest and value to the general public and road users; and the department may make or cause to be made from time to time a map or maps showing thereon the highways of the state and the municipalities, and other places of interest served and reached by said highways, and may cause to be printed, published, and prepared in a manner or form the department deems best, all of such information and data and provide for the distribution and dissemination of the same in such manner and method that will best serve the motoring public and road users.
SDCL 31-2-23