ABSTRACT
The analysis of highway safety improvements includes identifying high crash sites, proposing countermeasure treatments, and estimating the economic benefits associated with the crash reductions. Highway safety analysis is the passive pursuit of observing the safety consequences of some safety improvement measures implemented for certain purposes. To evaluate safety of highway segments, all potential sites need to be screened to identify the most critical sites and consequently address corresponding issues. For a highway network that can be partitioned into highway segments and intersections, safety analysis begins with identifying high crash segment or intersection sites. Autocorrelation techniques have been applied to vehicle crash analysis. To better predict the true effect of vehicle crashes' reduction as a result of a treatment, it is necessary to utilize additional information for analysis. In order to address safety concerns of high crashes on gradients, which are exacerbated by higher travel speeds, the vertical curvature of roadways is an important design criterion for consideration.
