Conflict analysis using surrogate safety measures (SSMs) has become an efficient approach to investigate safety issues. The state-of-the-art studies largely resort to video images taken from high buildings. However, it suffers from heavy labor work, high cost of maintenance, and even security restrictions. Data collection and processing remains a common challenge to traffic conflict analysis. Unmanned Aerial Systems (UASs) or Unmanned Aerial Vehicles (UAVs), known for easy maneuvering, outstanding flexibility, and low costs, are considered to be a novel aerial sensor. By taking full advantage of the bird’s eye view offered by UAV, this study, as a pioneer work, applied UAV videos for surrogate safety analysis of pedestrian-vehicle conflicts at one urban intersection in Beijing, China. Aerial video sequences for a period of one hour were analyzed. The detection and tracking systems for vehicle and pedestrian trajectory data extraction were developed, respectively. Two SSMs, that is, Postencroachment Time (PET) and Relative Time to Collision (RTTC), were employed to represent how spatially and temporally close the pedestrian-vehicle conflict is to a collision. The results of analysis showed a high exposure of pedestrians to traffic conflict both inside and outside the crosswalk and relatively risking behavior of right-turn vehicles around the corner. The findings demonstrate that UAV can support intersection safety analysis in an accurate and cost-effective way.


    Access

    Download


    Export, share and cite



    Title :

    Surrogate Safety Analysis of Pedestrian-Vehicle Conflict at Intersections Using Unmanned Aerial Vehicle Videos


    Contributors:
    Peng Chen (author) / Weiliang Zeng (author) / Guizhen Yu (author) / Yunpeng Wang (author)


    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Pedestrian safety evaluation of signalized intersections using surrogate safety measures

    Sankaran Marisamynathan / Perumal Vedagiri | DOAJ | 2020

    Free access

    Analysis of Pedestrian–Vehicle Interaction Dynamics at Signalized Urban Intersections: A Surrogate Safety Measure Approach

    Raoniar, Rahul / Singh, Shruti / Pathak, Abhinay et al. | Transportation Research Record | 2024


    Conflict-Based safety evaluations at unsignalized intersections using surrogate safety measures

    Singh, Dungar / Das, Pritikana / Ghosh, Indrajit | Elsevier | 2024

    Free access

    Pedestrian tracking from an unmanned aerial vehicle

    Bian, Chao / Yang, Zhen / Zhang, Tao et al. | IEEE | 2016


    Surrogate safety evaluation of incorrect pedestrian detection at signalized intersections

    Slavica Gavric / Ismet Goksad Erdagi / Aleksandar Stevanovic | DOAJ | 2024

    Free access