Evaluation and analysis on air quality in underground railway carriages in different climatic zones of China

The air quality in underground railway carriages is a key factor affecting the overall satisfaction of passengers, which is affected by the outdoor environment. Through questionnaire investigation and measurement, investigates the environment of underground railway carriages in winter and summer of typical cities in five climate zones of China in order to understand peculiar smell sensation, uncomfortable symptoms and air quality satisfaction of passengers. Estimates and analyses the results in line with related evaluation standards for indoor air quality, and puts forward the evaluating indices for air quality in underground railway carriages.