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LU: Bin, NIU Hui-min. Optimization method of phase difference for urban traffic arterial control system[J]. Journal of Traffic and Transportation Engineering, 2011, 11(4): 103-107. doi: 10.19818/j.cnki.1671-1637.2011.04.016
Citation: LU: Bin, NIU Hui-min. Optimization method of phase difference for urban traffic arterial control system[J]. Journal of Traffic and Transportation Engineering, 2011, 11(4): 103-107. doi: 10.19818/j.cnki.1671-1637.2011.04.016
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Optimization method of phase difference for urban traffic arterial control system

doi: 10.19818/j.cnki.1671-1637.2011.04.016

  • School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China

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  • Author Bio:

    LU Bin(1975-), male, associate professor, doctoral student, +86-931-4938025, jdlbxx@mail.lzjtu.cn

    NIU Hui-min(1963-), male, professor, PhD, +86-931-4938015, hmniu@mail.lzjtu.cn

  • Received Date: 2011-03-19
  • Publish Date: 2011-08-25
    Abstract
  • Based on the random distribution characteristic of link travel speed, the limitations of phase difference optimization methods for the existed arterial control systems were analyzed. Link travel time, vehicle delay and queue length were taken as evaluation indexes, the phase difference optimization algorithm of arterial control system was designed by using information entropy theory and multi-attribute synthetic decision method, and a simulation calculation was carried out. Calculation result indicates that when the variance of link travel speed increases from 5 km·h-1 to 10 km·h-1, link travel speed, vehicle delay and queue length of west-to-east traffic flow increase from 98.4 s, 13.5 s·pcu-1 and 9.1 pcu to 115.5 s, 15.9 s·pcu-1 and 12.3 pcu respectively. Link travel speed, vehicle delay and queue length of east-to-west traffic flow increase from 99.4 s, 13.5 s·pcu-1 and 9.2 pcu to 108.7 s, 14.3 s·pcu-1 and 10.8 pcu respectively. So, the random distribution characteristic of link travel speed has an obvious effect on settings of phase difference, and the optimal phase difference can be obtained by using the proposed model.

     

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