Program Complex, high-volume, on-demand, test-only, centralized I/M testing program. Geographic Area Served Hamilton, Rutherford, Sumner, Williamson and Wilson Counties (Nashville and Davidson County program changed vendors 6/07) Inspections (Millions) 1.1 Annual; 11.9 To Date Station/Lanes 9 Stations, 25 Lanes, 2 Mobile Units Tests OBD, idle, opacity, and gas cap Vehicle Information Database (VID) Fully … Continue reading Tennessee Vehicle Inspection Program