The Highway Safety Information System (HSIS) is a cooperative endeavor funded by the U.S. Federal Highway Administration, with data voluntarily provided to FHWA by the participating States.
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. The data are acquired annually from a select group of States, processed into a common computer format, documented, and prepared for analysis.
The system is designed to provide data to be used in research conducted in the general public interest, which is intended for publication in a scientific journal or other national publication. By submitting this request, the user is promising to follow these guidelines. Users wishing to obtain data for other purposes should contact the States directly. HSIS staff will be pleased to provide contact names and addresses.
All of the HSIS States maintain basic crash files, roadway inventory files, and traffic files. In addition, individual States also collect other types of data.
Examine the data available from each of the HSIS states.
Guidebooks are avaliable online for each HSIS state.