While most consumers still base their travel decisions largely on price, value for money, service and availability, more and more people are taking environmental factors into account. The railway community is therefore working hard to provide customers with comprehensive information on climate change, air pollution and the ‘external costs’ of transport. New internet-based tools, such as EcoPassenger and EcoTransIT (see Figure 6), are making a range of data available to customers. These interactive services enable customers to calculate emissions for journeys made using different transport modes