TY - JOUR
T1 - A Prediction Accuracy-Practicality Tradeoff Analysis of the State-of-the-art Safety Performance Assessment Methods
AU - So, Jaehyun
AU - Hoffmann, Silja
AU - Lee, Joyoung
AU - Busch, Fritz
AU - Choi, Keechoo
N1 - Funding Information:
This research was in part supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning (NRF-2010-0029446).
Publisher Copyright:
© 2016 The Authors. Published by Elsevier B.V.
PY - 2016
Y1 - 2016
N2 - This study proposes advanced safety assessment methods in the perspectives of prediction performance and practicality. This study thus develops three different safety assessment approaches (simulated conflicts-incorporated, estimated conflicts-incorporated, and intersection operational attributes-based safety performance function) and utilizes two existing approaches (annual average daily traffic-based and simulated conflicts-based safety performance functions. These five safety assessment approaches are compared in terms of crash prediction performance at intersections and practicality representing the required efforts in implementing a method. The results showed that the simulated conflicts-incorporated safety performance function approach was best in terms of prediction performance while the annual average daily traffic-based safety performance function approach was best in the practicality aspect. The discussion on trade-off between prediction performance and practicality then followed based on the analysis on the prediction performance and practicality aspects. This study will be a reference to safety assessment practitioners when they need to assess safety on roadways and to select an appropriate safety assessment method with limited resources.
AB - This study proposes advanced safety assessment methods in the perspectives of prediction performance and practicality. This study thus develops three different safety assessment approaches (simulated conflicts-incorporated, estimated conflicts-incorporated, and intersection operational attributes-based safety performance function) and utilizes two existing approaches (annual average daily traffic-based and simulated conflicts-based safety performance functions. These five safety assessment approaches are compared in terms of crash prediction performance at intersections and practicality representing the required efforts in implementing a method. The results showed that the simulated conflicts-incorporated safety performance function approach was best in terms of prediction performance while the annual average daily traffic-based safety performance function approach was best in the practicality aspect. The discussion on trade-off between prediction performance and practicality then followed based on the analysis on the prediction performance and practicality aspects. This study will be a reference to safety assessment practitioners when they need to assess safety on roadways and to select an appropriate safety assessment method with limited resources.
KW - Accuracy-practicality tradeoff
KW - Microscopic traffic simulation model
KW - Safety Performance Function (SPF)
KW - Surrogate safety measures
KW - Traffic conflict
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U2 - 10.1016/j.trpro.2016.06.066
DO - 10.1016/j.trpro.2016.06.066
M3 - Conference article
AN - SCOPUS:84999885031
SN - 2352-1457
VL - 15
SP - 794
EP - 805
JO - Transportation Research Procedia
JF - Transportation Research Procedia
T2 - International Symposium on Enhancing Highway Performance, ISEHP 2016
Y2 - 14 June 2016 through 16 June 2016
ER -