Chestnut Expressway near the RDI Building will be closed 6pm Friday December 1 until 6am Monday December 4 because MoDOT will be pouring concrete for the north side of Chestnut Bridge.
From the MoDOT announcement:
TRAFFIC ALERT: Chestnut Exp. at the railroad bridge west of Route 65 in #SGF will be CLOSED the weekend of Dec. 1. Crews are pouring concrete for the north 1/3 of the new bridge. Traffic will be detoured via several nearby city streets during the closing. Here’s the latest on the bridge project: http://tinyurl.com/yd98po2m