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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2015  >  15(4): 93-100
JIA Xing-li, FU Zhi-peng, XU Jin-liang, CHEN Wen-hui, JING Li-zhu. Effectiveness test of speed-limit sign in one-way closed work zone for expressway[J]. Journal of Traffic and Transportation Engineering, 2015, 15(4): 93-100. doi: 10.19818/j.cnki.1671-1637.2015.04.012
Citation: JIA Xing-li, FU Zhi-peng, XU Jin-liang, CHEN Wen-hui, JING Li-zhu. Effectiveness test of speed-limit sign in one-way closed work zone for expressway[J]. Journal of Traffic and Transportation Engineering, 2015, 15(4): 93-100. doi: 10.19818/j.cnki.1671-1637.2015.04.012
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Effectiveness test of speed-limit sign in one-way closed work zone for expressway

doi: 10.19818/j.cnki.1671-1637.2015.04.012
  • 1.

    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an UniversityXi'an 710064, Shaanxi, China

  • 2.

    CCCC First Highway Consultants Co., Ltd., Xi'an 710075, Shaanxi, China

  • 3.

    Tianjin Cement Industry Design and Research Institute Co., Ltd., Tianjin 300400, China

  • 4.

    Cockrell School of Engineering, The University of Texas at Austin, Austin 78741, Texas, USA

More Information
  • Author Bio:

    JIA Xing-li(1986-), male, lecturer, PhD, +86-29-82334864, jxl0126@sina.com

  • Received Date: 2015-01-12
  • Publish Date: 2015-04-25
    Abstract
  • The warning effectiveness of traffic sign, especially the speed-limit sign, in one-way closed work zone of experessway, was studied by using field tests and statistical analysis.The grading speed-limit program was proposed and the test program for traffic sign effectiveness was set up.A typical expressway section was chosen to test the effectivenesses of existing traffic sign, speed-limit sign position, grading speed-limit and optimizing traffic sign.Test result shows that the effectiveness of existing traffic sign, especially the speed-limit sign, is insufficient for speed-limit.In the expressway test section, after the vehicles pass through the speed-limit sign, they still have much higher speeds than the speed-limit values, and the speed reductions of the vehicles are very small.Through the optimization of traffic sign using grading speed-limit, the vehicles after passing through the work zone have significant reductions in their speeds, the speed of passenger car reduces by 38km·h-1, and the speed of freight car reduces by 32km·h-1.The difference value between passenger car running speed and the speed-limit value has reduced from 60km·h-1 to 15km·h-1, this kind of speed difference value for freight car is from 40km·h-1to 5km·h-1, the speeds of vehicles are very close to the speed-limit values, and the variation tendency of traffic flow speed is consistent with the speed-limit difference value, so the effectiveness of traffic sign is greatly improved by the grading speed-limit optimization.

     

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