The Tennessee Department Of Transportation Is Once Again Sending Four Lime-Yellow Help Trucks To The Tri Cities This Weekend To Assist With The Heavy Traffic Expected To Attend Nascar Activities At Bristol Motor Speedway. The Help Trucks Will Patrol The Area On Saturday And Sunday From 9:30 Am To 8:30 Pm Each Day. Mark Nagi With TDOT Says The Trucks Are Four Wheel Drive And Can Assist Motorists With A Stalled Vehicle, Air Pressure, Or A Flat Tire. In Addition, TDOT Will Provide Message Signs To Warn Drivers Of Any Possible Traffic Delays.