Fatal accidents and travel density. Paper presented at the 52nd Annual Meeting of the Highway Research Board HRB, Washington, D.C., January 1973.

A study of State Highway Department reports summarizing fatal accident experience by highway system and individual fatal accidents on the interstate travel data suggests that (1) sections of a highway system with higher travel densities typically have lower accident rates, and (2) for equivalent travel density differences between sections of a highway system. Differences in fatal accindent rates tend to be greater at lower densities.