KNBN NewsCenter1 March 3, 2021 OELRICHS, S.D. – The South Dakota Department of Transportation (SDDOT) says 10 miles of work on U.S. Highway 18 / U.S. Highway 385 will begin Monday, March 15, 2021. The construction begins one-half mile north of Oelrichs and continues toward the Smithwick Road turn-off. Construction work will repair the southbound lane with three total reconstruction areas and includes one box culvert replacement, asphalt surface milling, and new asphalt surfacing. Traffic will be reduced to two head to head lanes for the 10 miles of construction with two crossovers used to move the traffic. Motorists are asked to be prepared for the use of flaggers, a grooved surface, 12-foot width restrictions, and suddenly slowing, merging, or stopped traffic.