The South Dakota Department of Transportation says preparation work has begun on State Highway 37 south of Mitchell for the eventual construction of turn lanes.

The contractor is currently saw cutting shoulders in preparation for turn lanes that will be constructed just south of Mitchell at the intersection of Highway 37 and the county roads at 256th Street, 258th Street, 259th Street and 260th Street.

Once preparation work is complete and soil conditions allow, turn lane construction will begin.

In addition to the turn lane construction, concrete repair and smoothness grinding will be done on 29 miles of Highway 37 between from eight miles south of Parkston and to just south of Walmart in Mitchell.

Motorists can expect one lane of traffic and closures of up to three miles. Drivers will be guided through the work zones with the use of flaggers and pilot cars and should expect up to 15-minute delays and may want to consider an alternate route.

Motorists are reminded to slow down in work zones, be prepared for suddenly slowing and stopped traffic, and be aware of construction workers and equipment adjacent to the driving lane.

The prime contractor for the $6.8 million project is BX Civil and Construction, of Dell Rapids. The contract completion date for the project is Nov. 8.