Alcohol has been recognised as a major factor in road crashes. However, no official data are provided in Ireland to indicate what proportion of the deaths on Irish roads has alcohol as a contributory factor. Irish drivers do drink alcohol and drive. A study on fatal crashes in 2003 showed that over a third of fatal crashes were alcohol related. The aim of this study was to build on the data for 2003 and provide information on the extent of the relationship between drink driving and fatal crashes in 2004 and 2005.