?A project aimed at identifying accident blackspots at midblock locations on N.S.W. State highways and freeways is described. The locations of approximately 20,000 crashes on State highways and freeways, covering a two and a half year period, were assigned numeric grid co-ordinates using the Australian Map Grid. The data were used to identify 20 rural sites with high crash frequency, the sites being defined as 200m lengths of road.