Appraisal of the environmental impacts of rail schemes for a client in the rail industry Drawing together the work of academics, government and others into a single reference guide, this appraisal of the environmental impacts of rail schemes contributes to the debate on the appropriate level of public support for rail services. It contains an introduction to future transport problems, a guide to assessing public support for new transport services, and estimates of the financial and environmental costs of road and rail passenger transport. It also includes analysis of the marginal costs of travel by road and rail in the long run—the appropriate measure of the cost of meeting future demand.