A contractor for the Kentucky Transportation Cabinet plans a traffic shift starting at noon Thursday in a work zone for milling and paving on I-24 between the Calvert City and Grand Rivers exits. Both eastbound and westbound traffic is restricted to one lane on I-24 in this work zone. Since work started July 5, all traffic has been moved to the left-hand or passing lane between the exits. Starting around midday Thursday, the contractor plans to switch traffic to the right-hand or driving lane to allow milling and paving along the passing lane. Motorists should continue to be alert for slowing and merging traffic as they approach this work zone. Work on this section should be completed in about 2 to 3 weeks, weather permitting.