The Tennessee Department Of Transportation Will Be Sending Special Help To The Tri Cities This Weekend To Assist With The Heavy Traffic Expected For Nascar Racing Events At Bristol Motor Speedway. Three Lime-Yellow Help Trucks From Knoxville Will Patrol The Area To Assist With Any Incidents That May Occur In An Effort To Keep Traffic Moving. TDOT Will Also Provide Portable Message Signs To Warn Drivers Of Any Possible Delays.