YANG Fu-she, ZOU Qun, LI Ming, CHEN Kuan-min, GAO Yang. Evaluation method of urban expressway service level based on traveling speed index[J]. Journal of Traffic and Transportation Engineering, 2014, 14(5): 68-73.
Citation: YANG Fu-she, ZOU Qun, LI Ming, CHEN Kuan-min, GAO Yang. Evaluation method of urban expressway service level based on traveling speed index[J]. Journal of Traffic and Transportation Engineering, 2014, 14(5): 68-73.

Evaluation method of urban expressway service level based on traveling speed index

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  • Author Bio:

    YANG Fu-she(1963-), male, associate professor, doctoral student, +86-29-82334636, fusheyang@chd.edu.cn

    CHEN Kuan-min(1957-), male, professor, PhD, +86-29-82334636, chenkm@yeah.net

  • Received Date: 2014-06-09
  • Publish Date: 2014-10-25
  • According to the characteristics of urban expressway, urban expressway was divided into basic section, weaving section, diverging and merging section.The traveling speed of free flow was calculated by using Greenshields model, and spot speed data were collected through dual-loop detector to estimate traveling speed.After the consistency test of right side mean and mean square deviation for traveling speed index, the service level was quantified, the evaluation method of urban expressway service level based on traveling speed index was proposed, and example verification was carried out on the Southern Section of Second Circular Road of Xi'an City.Evaluation result shows that when the traveling speeds in free flow, peak period and flat peak period are 82.514, 47.825 and 67.930 km·h-1 respectively, the mean and mean square deviation of traveling speed index in peak period are 7.206, 8.482 respectively, and the service level of urban expressway is 2.667 and is Ⅲ level.The mean and mean square deviationof traveling speed index in flat peak period are 6.408, 8.960, and the service level of urban expressway is 4.083 and is Ⅱ level.The calculation result consists with actual situation, so the proposed method is effective.

     

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