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Assessing right-turning vehicle-pedestrian conflicts at intersections using an integrated microscopic simulation

Peng Chen1, Weiliang Zeng2, Guizhen Yu1

  • 1Beihang University, Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control, School of Transportation Science and Engineering, No. 37, Xueyuan Road, Haidian District, Beijing, CN, 100191, China; Beihang University, Beijing Advanced Innovation Center for Big Data and Brain Computing, No. 37, Xueyuan Road, Haidian District, Beijing, CN, 100191, China.

Accident; Analysis and Prevention
|June 7, 2019
PubMed
Summary

This study validates a simulation approach for assessing vehicle-pedestrian safety at intersections. The model accurately predicts conflict frequency and severity, aiding in proactive safety improvements for urban crosswalks.

Keywords:
Microscopic simulationPedestrianSafety assessmentSignalized intersectionTraffic conflictTurning vehicle

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Area of Science:

  • Traffic Safety Engineering
  • Urban Planning
  • Simulation Modeling

Background:

  • Vehicle-pedestrian conflicts at intersections are a significant safety concern.
  • Assessing these conflicts before implementing changes is crucial for effective safety management.

Purpose of the Study:

  • To verify the utility of simulation for evaluating right-turning vehicle-pedestrian conflicts at intersection crosswalks.
  • To establish and integrate behavior models for realistic conflict simulation.

Main Methods:

  • Development of vehicle turning path, speed, and gap acceptance models.
  • Integration of pedestrian behavior models into a unified simulation platform.
  • Validation using field data from UAVs at urban intersections in Beijing, China.

Main Results:

  • The simulation model accurately reproduced the frequency and severity of conflicts.
  • Surrogate Safety Measures (SSMs), including Post Encroachment Time (PET), validated the model's performance.
  • Sensitivity analysis revealed that larger intersection dimensions and turning angles negatively impact safety.

Conclusions:

  • Simulation offers a viable and innovative approach for pre-implementation safety assessment of vehicle-pedestrian interactions.
  • The developed model provides a reliable tool for analyzing intersection safety under various conditions.
  • Intersection geometry significantly influences safety outcomes, highlighting areas for design improvement.