Predictive Modeling of Accident-Prone Road Zones and Action Recognition in Unstructured Traffic Scenarios using ADAS Systems at Population Scale
Ravi Shankar Mishra
Abstract
This thesis addresses the critical challenge of improving road safety by introducing novel approaches to predictive modeling of accident-prone zones and action recognition in critical traffic scenarios. It makes two key contributions: the early identification of accident-prone zones using Advance Driving Assistance System (ADAS) data and the development of IDD-CRS, a comprehensive dataset for action recognition in unstructured road environments.
In the first study, geo-tagged collision alert data from a fleet of 200 ADAS-equipped city buses in Nagpur, India, is leveraged to proactively identify high-risk zones across urban road networks. Using Kernel Density Estimation (KDE), this study captures the spatiotemporal distribution of collision alerts, enabling the detection of emerging blackspots before accidents occur. A novel recall-based metric evaluates the alignment of these predicted zones with historical blackspots, while Earth Mover Distance (EMD)-based analysis identifies previously unreported accident-prone areas. This predictive framework provides civic authorities with actionable insights for targeted interventions, such as traffic-calming measures and infrastructure improvements, thereby enhancing public safety.
The second part of the thesis introduces the IDD-CRS dataset, a large-scale collection of traffic scenar- ios recorded using ADAS and dash cameras. IDD-CRS fills a critical gap in existing datasets by focus- ing on complex interactions between vehicles and pedestrians, with scenarios such as high-speed lane changes, unsafe vehicle approaches, and near-miss incidents. With precise temporal annotations pow- ered by ADAS technology, the dataset ensures accurate event boundaries, providing a robust benchmark for action recognition and long-tail action recognition tasks. It includes 90 hours of footage spanning 5,400 one-minute videos and 135,000 frames, with hard negative examples to challenge existing mod- els. Initial benchmarks highlight the limitations of current video backbones in recognizing rare events, emphasizing the need for further advancements.
Together, these contributions provide a holistic framework for improving road safety through proactive accident prevention and robust action recognition in traffic scenarios. By addressing both spatial acci- dent prediction and temporal event recognition, this work offers foundational resources and actionable insights to advance research and practical solutions for safer road environments.
Year of completion: | April 2025 |
Advisors : | Ravi Kiran Sarvadevabhatla |
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