S.D. Codified Laws § 31-1-5

Administrative systems of highways--Classification

Applied in 12 court decisions — leading case Willoughby v. Grim (1998)

Most recently applied in Mahmoudi v. City of Spearfish (August 2025)

Source: SL 1955, ch 106, § 1; SDC Supp 1960, § 28.0238.

How often courts cite this section

citing decisions per year

Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.

For the purpose of clarifying the duties and powers of the various governmental state agencies charged with the administration of the highways in South Dakota, the following definitions of highway systems shall be applicable:

(1) "State trunk system," the highways designated by statute to be controlled and supervised by the Department of Transportation;

(2) "County highway system," the highways designated by the board of county commissioners in organized counties under the supervision of these bodies that have been approved by the Department of Transportation;

(3) "Township highways," the secondary highways in organized townships that are administered by a board of township supervisors;

(4) "County secondary highways," the rural local highways in organized counties, excluding the approved county highway system, that are under the supervision of a board of county commissioners.

Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.