Application of regression techniques to highway systems safety

Abstract

The highway system was classified into its main elements and the variables affecting each element were identified and shown how they fit into a matrix description of highway accidents. A statistical methodology was provided and applied that can effectively be used in analyzing the system of accident related variables and determining their relationship with highway accidents. Several different regression equations were calculated which use variables from the roadway/environment element of the highway system. These equations were calculated using “dummy” variable techniques as well as the analysis of grouped data, and comments were provided on the use of each technique. The equations were useful in providing information about the roadway/environment to the analyst or decision maker in relationship to highway safety.