SDCL § 31-28-22: Prohibited sign as nuisance.

Every sign, signal, marking, or device prohibited by §§ 31-28-19 and 31-28-20 is hereby declared to be a public nuisance, and the Department of Transportation or local authorities within their respective jurisdictions shall remove the sign, signal, marking, or device or cause it to be removed immediately. The removal may be done without notice.