The difficulties associated with defining and funding an acceptable transport system to serve the needs of Australians living in the Centre and North of the continent have proved a continuing area of concern to successive Commonwealth and State Governments. In this study an attempt has been made to define a broad network of supply links to the major population centres of the Northern Territory and identify priorities for investment which would provide a satisfactory level of service at minimum total cost. The basic criterion of acceptability was taken as the provision of all weather links between the Northern Territory centres and their major sources of supply.