Author/Authors :
Park، Shin Hyoung نويسنده is now an Assistant Professor of the Department of Transportation Engineering at Keimyung University in South Korea , , Jang، Kitae نويسنده he has been an Assistant Professor with the Cho Chun Shik Graduate School for Green Transportation, Korea Advanced Institute of Science and Technology, Daejeon. , , Kim، Dong-Kyu نويسنده He is currently an Assistant Professor of the Department of Civil and Environmental Engineering at Seoul National University in South Korea , , Kho، Seung-Young نويسنده He has been a Professor of the Department of Civil and Environmental Engineering at Seoul National University in South Korea. , , Kang، Seungmo نويسنده He is an associate professor in School of Civil, Environmental and Architectural Engineering at Korea University ,
Abstract :
Identifying hazardous locations on highways is a fundamental step in safety
improvement programs and projects since it provides decision makers with a basis for
allocating budgets and other resources in a cost-e ective manner. Extensive research has
been conducted to identify such locations. However, most studies have ignored the spatial
characteristics of crash occurrences and the relative signi cance of injury severity. In this
study, we develop a procedure for identifying hazardous locations on expressways based
on Geographically Weighted Regression (GWR) and Equivalent Property Damage Only
(EPDO). GWR is a spatial regression method that can re
ect spatial dependency and
heterogeneous relationships between crash occurrences and other explanatory variables.
EPDO is a comprehensive measure of crash occurrences weighted by the level of injury
severity. We apply this procedure to a case study in Gyeongbu Expressway in Korea. The
ndings from our case study show that the procedure can identify hazardous locations
on roadways while re
ecting crash frequency and injury severity simultaneously with the
comprehensive measure.
