In response to the rapid economic growth in China, its freeway system has become the
longest in the world and likely will continue to expand. Unfortunately, the safety issues on …

Abstract Safety Performance Functions (SPFs) provide a basis for identifying locations
where countermeasures can be effective. While SPFs in the Highway Safety Manual (HSM) …

Abstract In Germany and Europe in general, a relevant proportion of all road fatalities occur
in the nonmotorway rural road network. Although the predictive performance of most …

Abstract Safety Performance Functions (SPFs) can be used to predict the number of crashes
for highway facilities by site characteristics, including traffic exposures and other specific site …

Analyzing crash data is a complex and labor-intensive process that requires careful
consideration of multiple interdependent modeling aspects, such as functional forms …

The road alignment is a three-dimensional (3D) curve in nature. In this study, we
quantitatively examine the effect of 3D road alignment on traffic safety on mountainous …

Safety performance functions (SPFs) are indispensable analytical tools that usually play a
crucial role in estimating crash frequencies, identifying hotspots, analyzing crash …

Safety performance functions (SPFs) are statistical regression models used for estimating
crash counts by roadway facility classification. They are required for identifying high crash …

The freeway system of China is the longest in the world and planned to expand in the
following years. However, the safety conditions of freeways are drawing increasing concerns …

A common and challenging data and modeling aspect in crash analysis is unobserved
heterogeneity, which is often handled using random parameters and special distributions …