## 1 Introduction  
The COVID-19 pandemic highlighted the need for effective and efficient methods of disinfecting public transport systems, which are used by millions of people every day and can be a potential source of transmission [1; 2; 3; 4]. Traditional disinfection methods can be time-consuming and not always effective, so it is important to explore new alternatives [5; 6; 7]. [PERSON] et al. [8] noted that while the antimicrobial properties of UV radiation from mercury vapor lamps are well-established and have been used for over a century, this type of radiation is also harmful to human cells and tissues that contain DNA. The study highlights that exposure to UV radiation can result in skin irritation and potentially carcinogenic mutations, as well as eye damage, such as photokeraitis. The authors also noted that proper safety precautions should be taken when using UV radiation to disinfect surfaces. These results suggest that this method may not be suitable for use in situations where humans are exposed to UV irradiation. However, [PERSON] et al. [9] suggested and provided evidence that there is a specific wavelength range in the far-UVC region, at approximately 200 nm, that can effectively kill bacteria while minimizing damage to human cells. This proposed method of using 207 nm UV light in the presence of humans was based on the fact that UV light at a wavelength of approximately 200 nm is strongly absorbed by biomolecules, such as proteins, limiting its ability to penetrate deeper into living tissue. These findings have led to extensive research in recent years into the use of far-UVC for surface and air disinfection. This type of UV radiation has been shown to be highly effective in killing bacteria and other microorganisms, including SARS-CoV-2 [10], the virus that causes COVID-19, while being less harmful to human cells [11]. [PERSON] et al. demonstrated the efficacy of 222 nm far-UVC light in inactivating a wide range of common pathogens, including SARS-CoV-2 and influenza viruses. The study found that low doses of far-UVC were highly efficient in destroying all 12 pathogens tested, including SARS-CoV-2, HCoV-229 E, and H1N1 influenza A. [PERSON] et al. conducted a study to investigate the inactivation ability of UV radiation at different wavelengths on the SARS-CoV-2 virus under the same experimental conditions. The results showed that the inactivation ability decreased in the order of 254 nm, 265 nm, and 222 nm UV wavelengths. This suggests that all three wavelengths have the ability to inactivate the virus [12]. [PERSON] et al. also investigated the effectiveness of 222 nm UV light in disinfecting surfaces contaminated with SARS-CoV-2. The study concluded that 222 nm UV-C could be used for infection prevention and control against COVID-19 in both unoccupied and occupied spaces. This research supported the potential utility of far-UVC as a tool to control the spread of SARS-CoV-2 in public spaces [13]. The study in [14] concluded that the 222 nm Kr-Cl excimer lamp has high potential for use as a tool to inactivate various types of pathogens in the residential settings. [PERSON] et al. recently published a report demonstrating that continuous far-UVC exposure in occupied public spaces at the current regulatory exposure limit (-3 mJ/cm\({}^{2}\)/h) can achieve a significant level of viral inactivation in a relatively short period of time [11]. Despite the potential of far-UVC technology for the inactivation of SARS-CoV-2, researchers acknowledge that further efforts are needed to ensure safe disinfection with UV light that is protective of human health and the environment. Therefore, the use of 222 nm far-UVC radiation for surface disinfection and sterilization in public transportation may be a safe and effective way to reduce the risk of transmission of COVID-19. However, exposure to UV radiation can cause significant degradation of various materials, and several scientific articles have investigated the effects of UV degradation on various materials.