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LIU Xiao-ming, WANG Yu, JIANG Ming, WEI Zhong-hua. Investigation of information quantity threshold on combined traffic signs[J]. Journal of Traffic and Transportation Engineering, 2016, 16(1): 141-148. doi: 10.19818/j.cnki.1671-1637.2016.01.017
Citation: LIU Xiao-ming, WANG Yu, JIANG Ming, WEI Zhong-hua. Investigation of information quantity threshold on combined traffic signs[J]. Journal of Traffic and Transportation Engineering, 2016, 16(1): 141-148. doi: 10.19818/j.cnki.1671-1637.2016.01.017
shu

Investigation of information quantity threshold on combined traffic signs

doi: 10.19818/j.cnki.1671-1637.2016.01.017
  • 1.

    Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology, Beijing 100124, China

  • 2.

    Key Laboratory of Road Safety, Research Institute of Highway Ministry of Transport, Beijing 100088, China

More Information
  • Author Bio:

    LIU Xiao-ming (1964-), male, professor, +86-10-65292298, liuxm@mot.gov.cn

  • Received Date: 2015-09-10
  • Publish Date: 2016-02-25
    Abstract
  • Aiming at lacking quantitative basis for information quantity threshold of combined traffic signs, combined signs containing guide sign and lane directional sign were designed.The subjects'visual cognition accuracy and reaction time of combined signs were measured.The information quantity threshold of combined signs was obtained and tests were carried out to verify simulation results.Analysis result shows that when lane numbers are 3-7, the subjects'visual cognition accuracies of combined signs are 94.17%, 93.13%, 93.50%, 87.50%, 86.07% respectively, and reaction times are 2 437.54, 2 514.01, 2 634.18, 3 600.75, 3 836.21 ms respectively.The visual cognition reaction time of information for one road name in guide sign is equal to that of five arrows in combined signs, both are 0.5 s.The information quantity threshold of combined signs is equal to information quantity for six road names when guide picture is simple, and the information quantity threshold of combined signs is equal to information quantity for five road names when guide picture is complex.If guide sign and lane directional sign are combined, the information of road name should be decreased correspondingly.

     

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