Thanksgiving travelers using Interstate 94 — beware. Lane closures may keep traffic backed up through the holidays, as cold weather and a shortage of cement push back work on an interchange reconstruction project at Highway 20 in Racine County. The state Department of Transportation plans to continue work on the project during the Thanksgiving holiday weekend, with an end-date still undetermined. Continuing through the holiday, traffic on northbound (west) I-94 has shifted west to what is normally…