Abstract Using the data from loop detector sensors for near-real-time detection of traffic incidents on highways is crucial to averting major traffic congestion. While recent supervised machine learning methods offer solutions to incident detection by leveraging human-labeled incident data, the false alarm rate is often too high to be used in practice. Specifically, the inconsistency in the human labeling of the incidents significantly affects the performance of supervised learning models. To that end, we focus on a data-centric approach to improve the accuracy and reduce the false alarm rate of traffic incident detection on highways. We develop a weak supervised learning workflow to generate high-quality training labels for the incident data without the ground truth labels, and we use those generated labels in the supervised learning setup for final detection. This approach comprises three stages. First, we introduce a data preprocessing and curation pipeline that processes traffic sensor data to generate high-quality training data through leveraging labeling functions, which can be domain knowledge-related or simple heuristic rules. Second, we evaluate the training data generated by weak supervision using three supervised learning models—random forest, k-nearest neighbors, and a support vector machine ensemble—and long short-term memory classifiers. The results show that the accuracy of all of the models improves significantly after using the training data generated by weak supervision. Third, we develop an online real-time incident detection approach that leverages the model ensemble and the uncertainty quantification while detecting incidents. Overall, we show that our proposed weak supervised learning workflow achieves a high incident detection rate (0.90) and low false alarm rate (0.08).

    Highlights Data-centric approach improves data quality for supervised learning. Weak supervision framework creates large amount of probabilistically labeled training data without the ground-truth. Labels produced by weak supervision increase the accuracy of traffic incident detection and reduce the false alarm rate. Uncertainty quantification using deep ensemble enables real-time and trustworthy incident detection.


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    Title :

    A data-centric weak supervised learning for highway traffic incident detection


    Contributors:


    Publication date :

    2022-07-14




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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