CUMMING — Maps lined the cafeteria of Otwell Middle School on Thursday as residents reviewed the remaining proposed designs for the long-awaited Hwy. 20 improvement project. The state Department of Transportation held the open house to present the results of its analysis of ways to improve the 24-mile stretch of the corridor between Interstate 575 in Canton and Ga. 400 in Cumming. Included in the information was an explanation of the alternatives no longer under consideration and reviews of those recommended for additional study.