A Crash Surrogate Metric considering Traffic Flow Dynamics in a Motorway Corridor
Joint Authors
Source
Journal of Advanced Transportation
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-06-27
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
We proposed a new crash surrogate metric, i.e., the maximum disturbance that a car following scenario can accommodate, to represent potential crash risks with a simple closed form.
The metric is developed in consideration of traffic flow dynamics.
Then, we compared its performance in predicting the rear-end crash risks for motorway on-ramps with other two surrogate measures (time to collision and aggregated crash index).
To this end, a one-lane on-ramp of Pacific Motorway, Australia, was selected for this case study.
Due to the lack of crash data on the study site, historical crash counts were merged according to levels of service (LOS) and then converted into crash rates.
In this study, we used the societal risk index to represent the crash surrogate indicators and built relationships with crash rates.
The final results show that (1) the proposed metric and aggregated crash index are superior to the time to collision in predicting the rear-end crash risks for on-ramps; (2) they have a relatively similar performance, but due to the simple calculation, the proposed metric is more applicable to some real-world cases compared with the aggregated crash index.
American Psychological Association (APA)
Wang, Xu& Liu, Kai. 2018. A Crash Surrogate Metric considering Traffic Flow Dynamics in a Motorway Corridor. Journal of Advanced Transportation،Vol. 2018, no. 2018, pp.1-7.
https://search.emarefa.net/detail/BIM-1181850
Modern Language Association (MLA)
Wang, Xu& Liu, Kai. A Crash Surrogate Metric considering Traffic Flow Dynamics in a Motorway Corridor. Journal of Advanced Transportation No. 2018 (2018), pp.1-7.
https://search.emarefa.net/detail/BIM-1181850
American Medical Association (AMA)
Wang, Xu& Liu, Kai. A Crash Surrogate Metric considering Traffic Flow Dynamics in a Motorway Corridor. Journal of Advanced Transportation. 2018. Vol. 2018, no. 2018, pp.1-7.
https://search.emarefa.net/detail/BIM-1181850
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1181850