The state trunk highway system includes the following in Edmunds and McPherson counties:
From a point on U.S. Highway 12 in Roscoe near the southeast corner of section twenty-four, township one hundred twenty-three north, range seventy-one west, thence north via Roscoe to State Highway 10 near the northeast corner of section two, township one hundred twenty-six north, range seventy-one west.
SDCL 31-4-219