70:01:02:00.  Interstate highways. The following are the maximum speed limits on certain portions of the interstate highway system:

    (1)  Interstate Highway 90 beginning at milepost 0.0 and ending at milepost 55.02, seventy-five miles per hour; then beginning at milepost 55.02 and ending at milepost 67.8 and beginning at milepost 394.6 and ending at milepost 403.19, sixty-five miles per hour;

    (2)  Interstate Highway 29 beginning at milepost 0.0 and ending at milepost 04.7, then beginning at milepost 72.72 and ending at milepost 85.25, sixty-five miles per hour;

    (3)  Interstate Highway 190 beginning at its intersection with State Trunk Highway 44, then north for 0.2 mile, forty-five miles per hour; then north for 1.3 miles to the intersection with Interstate Highway 90, sixty miles per hour;

    (4)  Interstate Highway 229 northbound lanes beginning at milepost 0.0 at the junction with Interstate 29, then north to a point 0.5 miles south of the centerline of Interstate 90, sixty-five miles per hour; and

    (5)  Interstate Highway 229 southbound lanes beginning at milepost 0.0 at the junction with Interstate 29, then north to the centerline of Interstate 90, sixty-five miles per hour; then north 0.25 mile to Minnehaha County Road 125, fifty-five miles per hour.

    Each year from the Thursday preceding the first Friday in August through the second Sunday after the first Friday in August, the maximum speed limit is sixty-five miles per hour on the portion of Interstate Highway 90 beginning at milepost 28.9 and ending at milepost 55.02.

    Source: 13 SDR 196, effective June 28, 1987; 17 SDR 12, effective July 30, 1990; 8 SDR 15, effective August 1, 1991; 21 SDR 81, effective October 31, 1994; 22 SDR 165, effective June 2, 1996; 30 SDR 89, effective December 7, 2003; 38 SDR 8, effective August 3, 2011; 40 SDR 197, effective May 27, 2014; 41 SDR 217, effective June 29, 2015; 42 SDR 174, effective June 23, 2016; 43 SDR 131, effective April 19, 2017; 46 SDR 26, effective September 2, 2019; 46 SDR 146, effective June 30, 2020; 50 SDR 42, effective October 11, 2023.

    General Authority: SDCL 32-25-7.

    Law Implemented: SDCL 32-25-7.