The HSIP is a strategic program that uses data and analysis to target safety resources. This aggregate HSIP National Summary Baseline Report shows that between 2009 and 2012, States directed HSIP funds to address the predominant infrastructure-related crash types – roadway departure, intersection and pedestrian crashes.

Safety performance is measured by a reduction in the rate and number of fatalities and serious injuries on all public roads. There are many complexities associated with directly attributing reductions in fatalities and serious injuries at a national level to any one program. Existing modeling tools cannot isolate the safety effect of specific infrastructure and behavioral programs. However, we know that the programmatic activities to drive down fatalities and serious injuries need to be as varied as the causes of the crashes themselves. That is why, at the U.S. Department of Transportation, we continue to aggressively pursue a holistic approach to safety that includes engineering, enforcement, education, and emergency medical services.