Discovering Traffic Anomaly Propagation in Urban Space Using Traffic Change Peaks

2020 ◽  
pp. 67-76
Author(s):  
Guang-Li Huang ◽  
Yimu Ji ◽  
Shangdong Liu ◽  
Roozbeh Zarei
Keyword(s):  
Urban Space ◽  
Traffic Anomaly

Discovering Traffic Anomaly Propagation in Urban Space Using Enhanced Traffic Change Peaks

2021 ◽  
pp. 1-20
Author(s):  
Guang-Li Huang ◽  
Tuba Kocaturk ◽  
Chi-Hung Chi
Keyword(s):  
Urban Space ◽  
Detection Method ◽  
Grid Cell ◽  
Global Perspective ◽  
Gray Level ◽  
Image Processing Techniques ◽  
Propagation Pattern ◽  
Gps Trajectory ◽  
Processing Techniques ◽  
Traffic Anomaly

Discovering traffic anomaly propagation enables a thorough understanding of traffic anomalies and dynamics. Existing methods, such as Outlier-Tree, are not accurate to find out the trend of abnormal traffic for two reasons. First, they discover the propagation pattern based on the detected traffic anomalies. The imperfection of the detection method itself may introduce false anomalies and miss the real anomaly. Second, they develop a propagation tree of anomalies by searching continuous spatial and temporal outlier neighborhoods rather than considering from a global perspective, and thus cannot form a complete propagation tree if a spatial or temporal gap exists. In this paper, we propose a novel discovering traffic anomaly propagation method using the mesh data and enhanced traffic change peaks (en-TCP) to visualize the change of traffic anomalies (e.g., an area where vehicles are gathering or evacuating) and thus accurately capture traffic anomaly propagation. Inspired by image processing techniques, the GPS trajectory dataset in each time bin can be converted to one grid traffic image and be stored in the grid density matrix, in which the grid cell corresponds to the pixel and the density of grid cells corresponds to the Gray level ([Formula: see text]) of pixels. An enhanced adaptive filter is developed to generate traffic change graph sequences from grid traffic images in consecutive periods, and clustering en-TCP in a continuous period is to discover the propagation of traffic anomalies. The accuracy and effectiveness of the proposed method have been demonstrated using a real-world GPS trajectory dataset.

Virtual Embodiment as/and the Threshold of Love

2013 ◽  
Vol 3 (2) ◽  
pp. 97-109 ◽  
Author(s):  
Anne Harris
Keyword(s):  
Urban Space ◽  
State Building ◽  
Modern Life ◽  
Space And Time ◽  
Empire State Building ◽  
Arcades Project ◽  
Performance Texts ◽  
And Performance ◽  
The Stranger

This essay draws upon the author’s performance script Fall and Walter Benjamin’s The Arcades Project as a provocation for considering the ways performance texts provide a threshold for somatic inquiry, and for recognizing the limits of scholarly analysis that does not take up performance-as-inquiry. Set at the Empire State Building, this essay embodies the connections and missed possibilities between strangers and intimates in the context of urban modern life. Fall’s protagonist is positioned within a landscape of capitalist exchange, but defies this matrix to offer instead a gift at the threshold of life/death, virtual/real, and love/loss. Through somatic inquiry and witnessing as threshold experiences, the protagonist (as Benjamin’s flaneur) moves through urban space and time, proving that both scholarship and performance remain irrevocably embodied, and as such invariably tethered to the visceral, the stranger, risk, and death.

Allotments gardens and its role in the urban space – the study of Rzeszów

2018 ◽  
Vol 3 ◽  
pp. 33-40
Author(s):  
Zbigniew W. Czerniakowski ◽  
◽  
Tomasz Olbrycht ◽  
Monika Kucharska-Świerszcz ◽  
◽  
...  
Keyword(s):  
Urban Space
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