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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2014  >  14(5): 74-81
ZHANG Yong, TU Ning-wen, TAO Jun-jie. Identification method of dynamic road traffic network vulnerability[J]. Journal of Traffic and Transportation Engineering, 2014, 14(5): 74-81.
Citation: ZHANG Yong, TU Ning-wen, TAO Jun-jie. Identification method of dynamic road traffic network vulnerability[J]. Journal of Traffic and Transportation Engineering, 2014, 14(5): 74-81.
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Identification method of dynamic road traffic network vulnerability

  • 1.

    School of Urban Railway Transportation, Soochow University, Suzhou 215006, Jiangsu, China

  • 2.

    School of Management, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

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  • Author Bio:

    ZHANG Yong(1978-), male, associate professor, PhD, +86-512-67601052, sinkey@126.com

  • Received Date: 2014-05-10
  • Publish Date: 2014-10-25
    Abstract
  • The trfffc flow propagation process of section and node and the discrete instantaneous dynamic equilibrium condition of optimal route choice for user were analyzed, the reactive traffic flow model of dynamic user equilibrium network was established, diagonalizable heuristic algorithm was designed to solve the model, and the dynamic vulnerability index of road network was evaluated.Analysis result shows for an example road network with 12 sections and 9 nodes, free-flow speed is 40 km·h-1 and jam density is 125 veh·km-1, when section 1 is broken at time 3, vehicle amount at peak time increases from the original 50 veh to 100 veh at section 3, the inflow of section 3 increases by 1 time, and the inflow of section 2 drops to 0.The damage of section 1 doubles the vehicles on the path consisting of sections 3, 6, 7 and 10, the increase of vehicle amount leads to the increase of impedance on each section.The traffic flow propagation process of vehicle bypassing the broken section can be described, the proposed method is effective to identify the vulnerability of road network for each section at each time.

     

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