The Mississippi Department of Transportation has announced several construction and maintenance project updates in north Mississippi. U.S. 278 / State Route 6 mill and overlay in Panola County A project to mill and overlay approximately 14 miles of U.S. 278 is now complete in Panola County. The $13.6 million project was awarded to Lehman-Roberts Company. State Route 7 widening project in Lafayette County Work is progressing on the large-scale wi…