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dc.contributor.authorChen, X.
dc.contributor.authorWang, H.
dc.contributor.authorRazi, A.
dc.contributor.authorRusso, B.
dc.contributor.authorPacheco, J.
dc.contributor.authorRoberts, J.
dc.contributor.authorWishart, J.
dc.contributor.authorHead, L.
dc.contributor.authorBaca, A.G.
dc.date.accessioned2023-12-21T18:45:49Z
dc.date.available2023-12-21T18:45:49Z
dc.date.issued2022-11-17
dc.identifier.citationChen, X., Wang, H., Razi, A., Russo, B., Pacheco, J., Roberts, J., ... & Baca, A. G. (2022). Network-Level Safety Metrics for Overall Traffic Safety Assessment: A Case Study. IEEE Access, 11, 17755-17778.
dc.identifier.issn2169-3536
dc.identifier.doi10.1109/ACCESS.2022.3223046
dc.identifier.urihttp://hdl.handle.net/10150/670413
dc.description.abstractDriving safety analysis has recently experienced unprecedented improvements thanks to technological advances in precise positioning sensors, artificial intelligence (AI)-based safety features, autonomous driving systems, connected vehicles, high-throughput computing, and edge computing servers. Particularly, deep learning (DL) methods empowered volume video processing to extract safety-related features from massive videos captured by roadside units (RSU). Safety metrics are commonly used measures to investigate crashes and near-conflict events. However, these metrics provide limited insight into the overall network-level traffic management. On the other hand, some safety assessment efforts are devoted to processing crash reports and identifying spatial and temporal patterns of crashes that correlate with road geometry, traffic volume, and weather conditions. This approach relies merely on crash reports and ignores the rich information of traffic videos that can help identify the role of safety violations in crashes. To bridge these two perspectives, we define a new set of network-level safety metrics (NSM) to assess the overall safety profile of traffic flow by processing imagery taken by RSU cameras. Our analysis suggests that NSMs show significant statistical associations with crash rates. This approach is different than simply generalizing the results of individual crash analyses, since all vehicles contribute to calculating NSMs, not only the ones involved in crash incidents. This perspective considers the traffic flow as a complex dynamic system where actions of some nodes can propagate through the network and influence the crash risk for other nodes. The analysis is carried out using six video cameras in the state of Arizona along with a 5-year crash report obtained from the Arizona Department of Transportation (ADOT). The results confirm that NSMs modulate the baseline crash probability. Therefore, online monitoring of NSMs can be used by traffic management teams and AI-based traffic monitoring systems for risk analysis and traffic control. Author
dc.language.isoen
dc.publisherInstitute of Electrical and Electronics Engineers Inc.
dc.rightsCopyright is held by the author(s) or the publisher. If your intended use exceeds the permitted uses specified by the license, contact the publisher for more information. This work is licensed under a Creative Commons Attribution 4.0 License.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAutonomous Vehicles
dc.subjectDeep Learning
dc.subjectDriving Safety Analysis
dc.subjectSafety Metrics
dc.titleNetwork-level Safety Metrics for Overall Traffic Safety Assessment: A Case Study
dc.typeArticle
dc.typetext
dc.contributor.departmentDepartment of Computer Science, The University of Arizona
dc.contributor.departmentSystems and Industrial Engineering, The University of Arizona
dc.identifier.journalIEEE Access
dc.description.noteOpen access journal
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleIEEE Access
refterms.dateFOA2023-12-21T18:45:49Z


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Copyright is held by the author(s) or the publisher. If your intended use exceeds the permitted uses specified by the license, contact the publisher for more information. This work is licensed under a Creative Commons Attribution 4.0 License.
Except where otherwise noted, this item's license is described as Copyright is held by the author(s) or the publisher. If your intended use exceeds the permitted uses specified by the license, contact the publisher for more information. This work is licensed under a Creative Commons Attribution 4.0 License.