
Research on the reasonable planting distance in central section of highway based on guiding the driving sight and anti-glare
FAN Yazhen, WANG Lianggui, WANG Jieming, XIANG Yanci, PENG Wengang, WANG Chenyang, LIU Bingyou
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 43 ›› Issue (6) : 181-187.
Research on the reasonable planting distance in central section of highway based on guiding the driving sight and anti-glare
【Objective】 In order to further improve highway traffic safety by meeting requirements for guiding driving sight and anti-glare, the aim of the present study was to determine reasonable planting distances for the central green belt of highways. 【Method】 A model for planting distance at different speed on straight and curved highway sections was constructed on the basis of guiding driving sight, drivers’ visual characteristics, and theHighway Engineering Technique Standard (JTG B01-2014), and a formula for planting distance was constructed on the basis of anti-glare, geometrical relationship, and Code for the Design of Traffic Safety Facilities on Highways (DB33/T 704-2013). Then, two sets of data were compared to determine a reasonable planting distance for the central green belt of highways. 【Result】 The best planting distances for optimizing plant guiding driving sight at 60, 80, 100 and 120 km/h, were 3.33, 4.44, 5.56, and 6.67 m, respectively, on straight sections of highway, and the best planting distances at 60, 80, 100 and 110 km/h, were 3.33, 4.44, 5.56 and 6.11 m on curved sections of highway. Meanwhile, the best planting distances for optimizing anti-glare were 2.45-17.14 m on straight sections of highway and 2.29-16.00 m on curved sections of highway. 【Conclusion】The best planting distances for meeting both requirements at 60, 80, 100 and 120 km/h were 2.45-3.33, 2.45-4.44, 2.45-5.56 and 2.45-6.67 m, respectively on straight sections of highway, and the best planting distances for meeting both requirements at 60, 80, 100 and 110 km/h were 2.29-3.33, 2.29-4.44, 2.29-5.56 and 2.29-6.11 m on curved sections of highway.
highway / plants in central section of expressway / planting distance / driving sight guidance / anti-glare
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