高速公路沿途绿化是给无机的道路添上有机的自然色彩,形成舒适的环境景观的主要因素。由于高速公路中央分隔带绿地呈线状,在构图、要素选择上,应保证整个沿线绿地有统一协调感;同时,每一段又要有其主题或特色,保证统一中有变化,丰富、美化道路景观。树种选择上应选择具有相对 Greening along the expressway is a major factor in adding organic natural colors to the inorganic path and creating a comfortable environment landscape. Due to the linear green space along the expressway central divider zone, a unified sense of coordination should be ensured throughout the green space along the composition and elements of choice. At the same time, each section should have its own theme or characteristics to ensure that changes, enrichments and landscaping roads are reunified landscape. Tree species should be selected with relative