The following are the maximum speeds on certain highways in Yankton County:

1. (1) State Trunk Highway 52 beginning at the west junction with State Trunk Highway 50, then south and east for 3.37 miles, fifty-five miles per hour; then east for 6.41 miles, fifty miles per hour; then east for 0.23 mile to 0.04 mile west of West City Limits Road in Yankton, forty miles per hour; then 1.33 miles on State Trunk Highway 52 to the junction with U.S. Highway 81 and State Trunk Highway 50, thirty miles per hour;
2. (2) State Trunk Highway 314 beginning at the intersection with State Trunk Highway 50 west of Yankton, then southeasterly 3.68 miles, fifty-five miles per hour; then southeasterly 0.09 mile to the end of the route, forty-five miles per hour;
3. (3) State Trunk Highway 46 beginning 0.25 mile west of the east Yankton County line, then east for 0.15 mile, forty miles per hour; then east for 0.1 mile to the east Yankton County line at Irene, twenty-five miles per hour;
4. (4) U.S. Highway 81 beginning at the north end of the Missouri River Bridge in Yankton and ending at the South Dakota/Nebraska border, forty-five miles per hour;
5. (5) U.S. Highway 81 beginning at the north end of the Missouri River Bridge in Yankton, then north to the south junction of U.S. Highway 81 and State Trunk Highway 50, thirty miles per hour; then north on U.S. Highway 81 and State Trunk Highway 50 for 1.89 miles, thirty miles per hour; then north 0.7 mile to the north junction of U.S. Highway 81 and State Trunk Highway 50, forty-five miles per hour; then north on U.S. Highway 81 for 0.42 mile, forty-five miles per hour; then north for 1.96 miles, fifty-five miles per hour;
6. (6) State Trunk Highway 50 beginning at the south junction with U.S. Highway 81 in Yankton, then east for 0.83 mile, thirty miles per hour; then east for 1.19 miles, thirty-five miles per hour; then east for 1.24 miles, forty-five miles per hour; then east for 0.78 mile, fifty-five miles per hour; then east to the Clay County line, seventy miles per hour.
7. (7) State Trunk Highway 50 beginning 1.28 miles west of the north junction of U.S. Highway 81 and State Trunk Highway 50, then east 1.28 miles to that junction, forty-five miles per hour; and
8. (8) State Trunk Highway 153 beginning at the intersection with State Trunk Highway 52 near Gavin's Point Dam, then north for 0.9 mile, forty-five miles per hour; then north to the intersection of State Trunk Highway 50 northwest of Yankton, fifty-five miles per hour.

Source: SL 1975, ch 16, § 1; 4 SDR 77, effective March 2, 1978; 5 SDR 51, 5 SDR 53, effective January 3, 1979; 6 SDR 109, effective May 29, 1980; 7 SDR 25, effective September 22, 1980; 7 SDR 117, effective June 21, 1981; 11 SDR 112, effective February 25, 1985; 12 SDR 7, effective July 28, 1985; 13 SDR 77, effective December 28, 1986; 13 SDR 129, 13 SDR 134, effective July 1, 1987; 19 SDR 128, effective March 8, 1993; 22 SDR 165, effective June 2, 1996; 23 SDR 132, effective February 27, 1997; 25 SDR 83, effective December 20, 1998; 26 SDR 110, effective March 6, 2000; 28 SDR 101, effective January 17, 2002; 28 SDR 181, effective July 4, 2002; 32 SDR 53, effective October 10, 2005; 33 SDR 189, effective May 15, 2007 ; 47 SDR 137, effective June 27, 2021; 48 SDR 54, effective November 15, 2021; 50 SDR 66, effective December 3, 2023 .

General Authority: SDCL 32-25-7 , 32-25-7 .1.

Law Implemented: SDCL 32-25-7 , 32-25-7 .1.

Prior versions effective: 2021-11-15, 2021-06-27, 2007-05-15.