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Pursuant to the authority vested in the South Dakota Transportation Commission by South Dakota Codified Law chapter 1-26, the commission will hold a public hearing in the Commission Room of the Becker Hansen Building at 700 East Broadway Avenue in Pierre, South Dakota, on Tuesday, Sept. 23, 2025, at 2 p.m. (Central Time) to consider proposed changes to the following rules:

70:01:02:04 – Beadle County speed zone rule.  The South Dakota Department of Transportation proposes to extend the current 45 miles per hour (mph) speed limit on U.S. Highway 14 on the south edge of Wolsey and the current 45 mph speed limit on Highway 37 in Huron.  The department is also clarifying the starting points for speed zones and revising speed zone measurements to the nearest one-tenth of a mile.  

70:01:02:09 – Lawrence County speed zone rule. On U.S. Highway 14A and U.S. Highway 85 at and around Cheyenne Crossing in Lawrence County, the department plans to add a 45 mph transition speed zone.  The department is also eliminating a truck speed limit on U.S. Highway 14A east of Cheyenne Crossing.  Furthermore, the department is correcting minor deviations in speed zone distances, revising measurements to the nearest one-tenth of a mile, and eliminating redundancy in the rule.   

70:01:02:27 – Fall River County speed zone rule.  On State Trunk Highway 79 in Fall River County, the department proposes to extend a 55 mph speed zone.  The department is also correcting minor deviations in speed zone distances, clarifying the starting points for speed zone rules, and revising speed zone measurements to the nearest one-tenth of a mile.  

70:01:02:32 – Hamlin County speed zone rule. The department proposes to extend the current 25 mph speed zone on State Trunk Highway 21 on the east edge of Hayti.  The department is also revising speed zone measurements to the nearest one-tenth of a mile.  

70:01:02:34 – Hanson County speed zone rule. On State Trunk Highway 262 in Hanson County, the department plans to lengthen the existing 45 mph speed zone at the I-90 interchange.  The department is also correcting naming conventions and revising measurements to the nearest one-tenth of a mile. 

70:01:02:41 – Jones County speed zone rule. The department is adding a 45 mph transition speed zone on U.S. Highway 83 in and around Murdo.  The department is also eliminating redundancy in the rule, clarifying the starting and ending points for speed zones, and revising speed zone measurements to the nearest one-tenth of a mile.

The hearing on these rules will be before the Transportation Commission at 2 p.m. on Tuesday, Sept. 23, 2025, in the Commission Room of the Becker-Hanson Building in Pierre.  More information about the rules is at the following link on the Open SD website: https://rules.sd.gov/agency.aspx?agency=DOT%20%20Department%20of%20Transportation

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