ADOT says drivers should plan for delays while overnight lane restrictions are in place on a two mile stretch of Highway-89A between Clarkdale and Cottonwood starting Sunday. Restrictions are in place daily from 8-pm to 6-am starting Sunday through Tuesday morning. North-and southbound 89A will be narrowed to one lane in each direction from milepost 349 to 351. Restrictions are needed so that crews can perform maintenance work on the roadway.