Challenge E: Bringing the territories closer together at higher speeds Indoor air quality at stations: Development of a methodology for quantifying railway customers’ perception of odor at stations

Introduction Providing more comfortable station environment foremost from the customer’s point of view is essential for sustaining railway customers. As the result of surveys regarding comfort and cleanliness of railway stations and airports, approximately 90% of customers answered that airports are more comfortable and cleaner than railway stations (Fig. 1). Customers also have shown a keen interest in indoor air quality and odor in stations (Fig. 2). Therefore, the authors commenced to perform surveys to evaluate the indoor air quality of railway stations that integrates customers’ views with investigations of airborne microorganisms.