Book excerpt: This text looks at a number of issues from the initial collection of data, through its planning and control, use of in marketing and demand management in the aspects of the application of Information Techology to the transport industry. It is aimed at students of transport systems who are seeking information on techniques used within the industry and the specialist practitioner seeking a description of related fields with a view to the development of linked transport systems or seeking inspiration from the methods adapted by specialists in other areas.