The Department of Transportation proposes to revise the dates for temporary reduced speed limits on Interstate Highway 90 between Sturgis and Rapid City, State Trunk Highway 34 in Sturgis, and State Trunk Highway 79 immediately north of its intersection with State Trunk Highway 34 in Meade County. Under the current rules, the temporary speed limit reductions do not always apply throughout the rally. Under the revised rules, the temporary speed limit reductions will begin the day before the Sturgis Motorcycle Rally and will continue through the end of the rally. The purpose of these rule revisions is to promote safety by ensuring reduced speed limits are in place to accommodate increased traffic volumes during the entire rally. The Department of Transportation is also proposing a new temporary speed limit reduction on State Trunk Highway 79 in and around its intersection with Big Horn Road in Meade County. This temporary reduced speed limit will also begin the day before the Sturgis Motorcycle Rally and continue through the end of the rally. The purpose of this new rule provision is to promote safety in an area with increased turning movements during the rally.