The participating States were selected based on the quality and quantity of data available, and their ability to merge data from various files. Click on the map below for more information.
| California | Illinois | Maine | Michigan | Minnesota |
| North Carolina | Ohio | Utah | Washington |
HSIS data are used in a wide variety of research efforts. Products of these efforts include HSIS summaries, research reports, safety analysis tools, and published articles and technical papers in professional journals.
HSIS is a roadway-based system that provides quality data on a large number of accident, roadway, and traffic variables. It uses data already being collected by States for managing the highway system and studying highway safety.
There are numerous agencies, organizations and other entities in the U.S. that are working to make our roads safer. Links are provided to the web sites of these groups as well as links to additional sources of crash data.
