Analysis of the Impact of Fog on Expressway Vehicle Speed

Abstract:

According to the traffic survey data and meteorological data of a certain section between Jinshan and Wuhan on Beijing-HK-Macao Expressway, the change of the weighted average speed and the speed of different vehicle types under different visibility grades was studied, and the linear speed-density model of Green Shields was improved using the method of curve estimation and regression analysis. The results show that the higher the grade of fog, the lower the driving speed, and the effect of fog on speed is even greater for faster vehicles than slower ones. In addition, by adding the two variables visibility and models to the Green Shields model, the accuracy of the model has been improved.

• Periodical: Applied Mechanics and Materials (Volumes 587-589)
• Pages: 2045-2048
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.587-589.2045
• Online since: July 2014
• Authors: Yuan Li Gu, Tong Jin Gao*
• Keywords: Expressway, Fog, Speed-Density Model, Visibility

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