Anti-glare effect of median green belt on high-grade highway

作者：Xiao Daiquan^*; Ma Rongguo; Li Tieqiang

来源：Journal of Southwest Jiaotong University, 2010, 45(3): 470-475.

DOI：10.3969/j.issn.0258-2724.2010.03.026

• Green belts
• Horizontal curves
• Straight sections
• Traffic Engineering
• Vertical curve

In order to study the anti-glare effect of the median green belt on horizontal and vertical curve sections of highway, the methods for calculating the spacing and height of the plants along the median strip on straight sections were presented. The plant spacings for different plant canopy diameters and anti-glare angles, and the plant heights for different road cross-sections and traffic compositions were calculated. Then, an improved formula for calculating the plant spacing on horizontal curve sections was derived, and the corrected anti-glare angles were obtained. An improved method for calculating the plant height on concave vertical curve sections was proposed, by which the anti-glare plant height increments on the concave vertical curve sections were calculated. Meanwhile, some improvement measures were proposed to prevent the glare at the lower edge of the median plants on convex vertical curve sections. The results show that compared to that on straight road sections, plant spacing should be reduced by 0.3 to 3.8 m on horizontal curve sections; and the plant height on concave curve sections should be increased by 0.03 to 0.43 m.

• 出版日期2010