To measure the performance of the activities of States aimed at reducing wet-pavement accidents, the Safety Board developed a Wet Fatal Accident Index (WFAI) for each State. This method indicated an area in the United States with good performance and a belt with poorer than average performance. Additionally, the NHTSA's Fatal Accident Reporting System (FARS) data showed the types of accidents and the characteristics of the roads where fatal accidents occurred during periods when the pavement was wet.
Abstract