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ZHANG Sheng-rui, TANG Guo-xi. On-ramp fuzzy logic control and auxiliary project design of freeway[J]. Journal of Traffic and Transportation Engineering, 2006, 6(4): 101-104.
Citation: ZHANG Sheng-rui, TANG Guo-xi. On-ramp fuzzy logic control and auxiliary project design of freeway[J]. Journal of Traffic and Transportation Engineering, 2006, 6(4): 101-104.
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On-ramp fuzzy logic control and auxiliary project design of freeway

  • School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

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  • Author Bio:

    Zhang Sheng-rui(1963-), male, PhD, professor, 86-29-82334262, zhangsr@chd.edu.cn

  • Received Date: 2006-07-12
  • Publish Date: 2006-12-25
    Abstract
  • In order to ensure the safe, expedite and comfortable operation of freeway mainline, and to lessen its influence on linked roads, a fuzzy logic controller of on-ramp was constructed, three kinds of auxiliary on-ramp projects were designed.In practical engineering, the upstream density, downstream density and entrance queue of vehicle-flux were selected as controller inputs, the metering rate of on-ramp was selected as controller output.Calculated result indicates that downstream vehicle speeds in mainline are decreasing obviously with the increasing of vehicle number in on-ramp; according to upstream density, downstream density and vehicle number, ramp metering rate can be calculated; the entrance of on-ramp vehicles can be controlled by the real-time adjusting of the metering rate of freeway on-ramp, the application of auxiliary projects can alleviate the congestion of linked roads, and improve the safety and efficiency of freeway running.

     

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    • References(11)
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