CrowdRadar: A Mobile Crowdsensing Framework for Urban Traffic Green Travel Safety Risk Assessment

Yigao Wang ^1,2 Qingxian Tang ^1,2 Wenxuan Wei ^1,2 Chenhui Yang ^1,2 Dingqi Yang ^3,4 Cheng Wang ^1,2 Longbiao Chen ^1,2*

• ¹ Fujian Key Laboratory of Sensing and Computing for Smart Cities (SCSC), Xiamen, China
• ² Xiamen University, Xiamen, China
• ³ University of Macau, Taipa, Macau Region, China
• ⁴ State Key Laboratory of Internet of Things for Smart City, University of Macau, Taipa, Macau Region, China

As environmental awareness increased due to the surge in greenhouse gases, green travel modes such as bicycles and walking have gradually became popular choices. However, the current traffic environment has many hidden problems that endanger the personal safety of traffic participants and hinder the development of green travel. Traditional methods, such as identifying risky locations after traffic accidents, suffer from the disadvantages of delayed response and lack of foresight. Against this background, we proposed a mobile edge crowdsensing framework to dynamically assess urban traffic green travel safety risks. Specifically, a large number of mobile devices were used to sense the road environment, from which a semantic detection framework detected the traffic high-risk behaviors of traffic participants. Then multi-source and heterogeneous urban crowdsensing data were used to model the travel safety risk to achieve a comprehensive and real-time assessment of urban green travel safety. We evaluated our method by leveraging real-world datasets collected from Xiamen Island. Results showed that our framework could accurately detect traffic high-risk behaviors with average F1-scores of 86.5% and assessed the travel safety risk with R² of 0.85 outperforming various baseline methods.