Two cleaning rooms have been converted and each can disinfect up to 250 buses a day, Qin added.
With around 1,000 buses needing disinfection daily, the UV system has reduced the amount of staff overtime and manpower needed for regular public transport disinfection.
The World Health Organization has cautioned that UV lamps should not be used to sterilise hands or other areas of skin — as UV radiation can cause skin irritation — but Qin said the chambers are closed off and activated by staff outside.
Health experts told AFP that UV light is not typically used to disinfect public areas, but can be effective if done right.
Paul Tambyah, president of the Asia Pacific Society of Clinical Microbiology and Infection, said UV disinfection is effective but needs to be used with care as the light can cause skin cancer.
“UV disinfection is widely used in hospitals worldwide after patients have left a room,” he said. “This is used for antimicrobial resistant pathogens, tuberculosis and other infectious agents.”
While it is not usually used on public transport, “there is no good reason why (it) would not work”.