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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2012  >  12(1): 50-54
LI Zhi-peng, PENG Tao, WANG Qian, ZHAN Zhang-shu. Calculation model of automobile braking distance on pavement with deicing salt[J]. Journal of Traffic and Transportation Engineering, 2012, 12(1): 50-54. doi: 10.19818/j.cnki.1671-1637.2012.01.009
Citation: LI Zhi-peng, PENG Tao, WANG Qian, ZHAN Zhang-shu. Calculation model of automobile braking distance on pavement with deicing salt[J]. Journal of Traffic and Transportation Engineering, 2012, 12(1): 50-54. doi: 10.19818/j.cnki.1671-1637.2012.01.009
shu

Calculation model of automobile braking distance on pavement with deicing salt

doi: 10.19818/j.cnki.1671-1637.2012.01.009

  • School of Traffic, Northeast Forestry University, Harbin 150040, Heilongjiang, China

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  • Author Bio:

    LI Zhi-peng(1963-), male, professor, +86-451-82191836, lizp386@sohu.com

  • Received Date: 2011-09-20
  • Publish Date: 2012-02-25
    Abstract
  • The forces conditions of front and rear wheels during automobile braking process were analyzed, and a mathematical model of automobile braking distance and road adhesion coefficient was established.Braking tests on ice-snow-covered pavement and the pavement after using deicing salt were carried out, and the braking distances under different primary braking speeds were calculated by using MATLAB software.Test result shows that on ice-snow-covered pavement, when the primary braking speeds are 10.8, 24.4, 31.4 km·h-1 respectively, the braking distances are 2.959, 18.378, 26.264 m respectively.On the pavement after using deicing salt, when the primary braking speeds are 11.0, 22.9, 31.0 km·h-1 respectively, the braking distances are 2.430, 13.766, 18.860 m respectively.After using deicing salt, the adhesion coefficient of the pavement increases significantly, and the test braking distance decreases by 25%-28%, the simulation braking distance decreases by about 30% and is close to the test value.So the calculation model is feasible.

     

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