A questionnaire was developed for use with a large semple of passengers travelling in British Rail stock on a cross-section of main line routes serviced by London Midland Region. The questionnaire was distributed to a stratified random empte of 1500 passengers — covering both male and female traveIters in five different carriage types. The aim of the study was to determine the improuements passengers would most like to see in existing carriage design, and generally whet they felt about the quality of their environment. The questionnaire included actions covering permnal and travel details, a check list of conceivable improvements, and the use of the semantic differential technique for obtaining passengers’ impressions and perceptions. The findings allowed comparisons to be made between the different carriage interiors and resulted in recommendations for the possible modification of certain carriage designs.