The Korea Railroad Research Institute (KRRI) has developed a train that can remove fine dust from metro tunnels to improve air quality for passengers. The train was presented at KRRI's research centre in Osong on 31st August 2023. According to KRRI, the train could collect 3.5 kg of particulate matter when operating 8 hours a day for a month, which is equivalent to the amount inhaled by three adults in a lifetime. The train uses the existing power supply and can travel at up to 70 km/h in both directions. The dust collection system includes automatic cleaning to reduce maintenance. Tests are planned to enable commercialisation of the design.
