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Department of Transportation

70:01:02:44 -Lincoln County speed zone rule

70:01:02:44 – Lincoln County speed zone rule. In response to petitions from the City of Harrisburg and Harrisburg School District 41-2, the South Dakota Transportation Commission will consider whether to reduce the 55 miles per hour (m.p.h.) speed limit on State Trunk Highway 115 in and around Harrisburg. If the speed limit is changed, the department proposes to also revise speed zone measurements to the nearest one-tenth of a mile. The petitioners propose a reduced speed limit on State Trunk Highway 115 for the purpose of enhancing safety. The change in speed zone measurements is proposed by the department to facilitate accurate speed zone signing.

New content is added below as the draft rules move through the rule-making process.

Agency Rules Hearing

Interim Rules Hearing

Important Dates
Public Hearing:
Comment Deadline:
Interim Rules Committee Hearing:
Filed-Secretary of State:
Rule Effective:

11/25/2025
11/21/2025

Agency Contact: Karla Engle mail to: DOTAdminRules@state.sd.us