| Abstract: | Given Australia's dispersed population distribution the construction and maintenance of transportation infrastructure is both essential and expensive. This paper presents a simple model for assessing geotechnical suitability for road construction across the continent, based upon the three major phases of road construction: earthworks, pavement construction and sealing. Data from the recently completed geotechnical landscape map of Australia have been used to operationalise the model at a national scale. The map was coded to the basic spatial units (modified local government areas) of the Australian Resources Information System, so forming an extensive geographic data base suited to a variety of national transport suitability assessments. As a demonstration, the road construction suitability model and the geotechnical data have been applied to the task of mapping the average suitability of each basic spatal unit in Australia for each of the three phases of road construction. The resulting maps provide a comprehensive overview of the instrinsic difficulty of providing roading throughout Australia. |
