Journal of Jilin University(Engineering and Technology Edition) ›› 2019, Vol. 49 ›› Issue (3): 688-694.doi: 10.13229/j.cnki.jdxbgxb20170612

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Social force model considering bi⁃direction pedestrian slipstreaming behavior

Ning⁃bo CAO1,2,Li⁃ying ZHAO3(),Zhao⁃wei QU1,Yong⁃heng CHEN1,Qiao⁃wen BAI1,Xiao⁃lei DENG1   

  1. 1. College of Transportation, Jilin University, Changchun 130022, China
    2. School of Economics and Management, Chang'an University, Xi'an 710064, China
    3. School of Economics and Management, Xi'an University of Technology, Xi'an 710054, China
  • Received:2017-06-12 Online:2019-05-01 Published:2019-07-12
  • Contact: Li?ying ZHAO E-mail:lyzhao@xaut.edu.cn

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Abstract:

To make pedestrians flow simulation model more comprehensive, and explore the effects of slipstreaming behavior on pedestrians crossing, a modified social force model is proposed to investigate pedestrians crossing process considering the slipstreaming behavior and conflict avoidance at signalized intersections. In the modified model, slipstreaming model, physical forces acting on pedestrians by signal control and crosswalk boundaries and conflict avoidance force are combined to simulate pedestrians at crosswalk. Based on the simulation results, the variations of crossing speed and potential accidents were analyzed. It is found that slipstreaming behavior can increase the crossing speed and reduce crossing time of bidirectional pedestrians; the conflict avoidance force can efficiently reduce potential accidents.

Key words: engineering of communications and transportation system, social force model, slipstreaming behavior, conflict avoidance, crosswalk

CLC Number: 

  • U491

Fig.1

Schematic diagram of pedestrians′ visual field"

Fig.2

Force between crosswalk boundary and"

Fig.3

Force of individual avoiding conflict"

Fig.4

Flow chart of individual collision avoidance"

Table1

Calibration results of parameters"

参数参数值p值
行人质量mα、mβ1–
行人之间物理力的强度Aαβ11.150.01
行人之间物理力影响距离Bαβ110.04
时间步Δt/s0.06–
行人与边界之间斥力的强度ABαr50.04
行人与边界之间斥力的范围BBαr0.10.02
行人与边界之间引力的强度ABαa4.70.01
行人与边界之间引力的范围BBαa0.20.02
行人与信号灯之间作用力强度ASα0.080.02
行人与信号灯之间作用力范围BSα0.030.03
行人半径r/m0.3–
视野半径vs/m4–
适应时间τα/s0.5–
各向异性λα0.3–
期望速度vα0(t)/（m·s－1）1.47–
阈值gi7–

Fig.5

Comparison of observed and simulated speeds"

Fig.6

Average velocity v against time steps t according"

Fig.7

Average velocity v against time steps t"

Fig.8

Comparison of potential accidents"

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