Over 70 % of DART buses are equipped with SanUVAire Breathe Safe Germicidal UV Systems that utilize ultraviolet germicidal irradiation technology to kill viruses as air is recirculated thought the bus.
All DART vehicles are cleaned with products identified by the Environmental Protection Agency (EPA) as successful n killing the coronavirus, as well as influenza, rhinovirus, salmonella, staphylococcus, and e-coli.
Link to Article https://thesiliconreview.com/magazine/profile/sanuvaire-protection-against-airborne-threats/