| Title |
Injury Severity Analysis of Truck-involved Crashes on Korean Freeway Systems using an Ordered Probit Model |
| Authors |
강찬모(Kang, Chanmo) ; 정연식(Chung, Younshik) ; 장유진(Chang, Yoo Jin) |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.3.0391 |
| Keywords |
고속도로;교통사고;화물차;사고 심각도;순서형 프로빗 모형 Freeway;Crash;Truck;Injury severity;Ordered probit model |
| Abstract |
In general, truck-involved crashes increase severity in terms of both injury level and crash impact level. Recently, although the frequency and fatality of truck-involved crashes in Korea are rising, their associative studies are very limited. Therefore, the objective of this study is to identify critical factors influencing on injury severity of truck-involved crashes on Korean freeway system. To carry out this objective, this study uses an ordered probit model (OPM) based on a 6-year crash dataset from 2012 to 2017. From the analysis, eight variables were found to have a great effect on injury severity: older driver, crash speed, rear-end collision, number of vehicles involved, drowsy driving, nighttime (0:00 to 6:00) driving, overturn or rollover, and vehicle's fire after crash. However, injury severity was less severe in crashes under snowy condition and crashes to traffic facilities (i.e., crash alone). |