- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | WANG Min, HE Zhaoyi, ZHOU Wen, LIANG Xin. Influencing Factors of Asphalt Pavement Visibility on Rainy Days[J]. Journal of Southwest Jiaotong University, 2023, 58(6): 1286-1293. doi: 10.3969/j.issn.0258-2724.20211079
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Under the condition of rainfall, the water spray splashed by the tires of vehicles during driving can easily form water mist, and the visibility in front will be significantly reduced. The subjective recognition distance of the human body will be rapidly reduced, and even the wrong judgment of driving distance will lead to traffic accidents. Therefore, it is of great significance to study the influencing factors of asphalt pavement visibility on rainy days. Based on Mie’s theory, the meteorological definition of visibility was utilized, and Monte Carlo numerical simulation was performed with MATLAB software. In addition, a visibility calculation model is put forward characterized by vehicle speed, water film thickness, and pavement design parameters and then analyzed the influencing factors of visibility. The results show that on rainy days, when the water film thickness of asphalt pavement is less than 5.873 mm, the visibility caused by water mist will decrease with the increase in vehicle speed and water film thickness; among the pavement design parameters, the length of drainage path and the depth of pavement structure are positively correlated with visibility, and there is a negative correlation between road slope and visibility. It is found that the visibility reaches the minimum when the water film thickness is 5.873 mm; an improved calculation model of asphalt pavement visibility characterized by rainfall intensity, depth of pavement structure, pavement slope, length of drainage path, and vehicle speed is proposed.
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